8092621681 has 3 divisors (see below), whose sum is σ = 8092711641. Its totient is φ = 8092531722.

The previous prime is 8092621679. The next prime is 8092621687. The reversal of 8092621681 is 1861262908.

It is a happy number.

The square root of 8092621681 is 89959.

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 is not a de Polignac number, because 8092621681 - 2¹ = 8092621679 is a prime.

It is a super-2 number, since 2×8092621681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8092621687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 44980 + ... + 134938.

It is an arithmetic number, because the mean of its divisors is an integer number (2697570547).

Almost surely, 2^8092621681 is an apocalyptic number.

8092621681 is the 89959-th square number.

8092621681 is the 44980-th centered octagonal number.

It is an amenable number.

8092621681 is a deficient number, since it is larger than the sum of its proper divisors (89960).

8092621681 is an frugal number, since it uses more digits than its factorization.

8092621681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179918 (or 89959 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 43.

The cubic root of 8092621681 is about 2007.6888761288.

Multiplying 8092621681 by its product of nonzero digits (82944), we get a square (671234412708864 = 25908192²).

The spelling of 8092621681 in words is "eight billion, ninety-two million, six hundred twenty-one thousand, six hundred eighty-one".