7020931681 has 3 divisors (see below), whose sum is σ = 7021015473. Its totient is φ = 7020847890.

The previous prime is 7020931667. The next prime is 7020931693. The reversal of 7020931681 is 1861390207.

The square root of 7020931681 is 83791.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1861390207 = 23 ⋅80930009.

It is not a de Polignac number, because 7020931681 - 2⁵ = 7020931649 is a prime.

It is a super-2 number, since 2×7020931681² = 98586963338538971522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7020931681.

It is not an unprimeable number, because it can be changed into a prime (7020931601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 41896 + ... + 125686.

It is an arithmetic number, because the mean of its divisors is an integer number (2340338491).

Almost surely, 2^7020931681 is an apocalyptic number.

7020931681 is the 83791-st square number.

7020931681 is the 41896-th centered octagonal number.

It is an amenable number.

7020931681 is a deficient number, since it is larger than the sum of its proper divisors (83792).

7020931681 is an frugal number, since it uses more digits than its factorization.

7020931681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167582 (or 83791 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The cubic root of 7020931681 is about 1914.8359932896.

The spelling of 7020931681 in words is "seven billion, twenty million, nine hundred thirty-one thousand, six hundred eighty-one".