2974720681 has 3 divisors (see below), whose sum is σ = 2974775223. Its totient is φ = 2974666140.

The previous prime is 2974720669. The next prime is 2974720691. The reversal of 2974720681 is 1860274792.

The square root of 2974720681 is 54541.

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.

It can be written as a sum of positive squares in only one way, i.e., 91030681 + 2883690000 = 9541^2 + 53700^2 .

It is not a de Polignac number, because 2974720681 - 2⁹ = 2974720169 is a prime.

It is a super-2 number, since 2×2974720681² = 17697926259938207522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2974720691) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 27271 + ... + 81811.

It is an arithmetic number, because the mean of its divisors is an integer number (991591741).

Almost surely, 2^2974720681 is an apocalyptic number.

2974720681 is the 54541-st square number.

2974720681 is the 27271-st centered octagonal number.

It is an amenable number.

2974720681 is a deficient number, since it is larger than the sum of its proper divisors (54542).

2974720681 is an frugal number, since it uses more digits than its factorization.

2974720681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109082 (or 54541 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 46.

The cubic root of 2974720681 is about 1438.1871285470.

The spelling of 2974720681 in words is "two billion, nine hundred seventy-four million, seven hundred twenty thousand, six hundred eighty-one".