79210681 has 4 divisors (see below), whose sum is σ = 86411664. Its totient is φ = 72009700.

The previous prime is 79210661. The next prime is 79210697. The reversal of 79210681 is 18601297.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 79210681 - 2⁷ = 79210553 is a prime.

It is a super-2 number, since 2×79210681² = 12548663968967522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79210661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3600475 + ... + 3600496.

It is an arithmetic number, because the mean of its divisors is an integer number (21602916).

Almost surely, 2^79210681 is an apocalyptic number.

It is an amenable number.

79210681 is a deficient number, since it is larger than the sum of its proper divisors (7200983).

79210681 is a wasteful number, since it uses less digits than its factorization.

79210681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7200982.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 79210681 is about 8900.0382583447. The cubic root of 79210681 is about 429.4651381168.

The spelling of 79210681 in words is "seventy-nine million, two hundred ten thousand, six hundred eighty-one".