79691953 has 4 divisors (see below), whose sum is σ = 86936688. Its totient is φ = 72447220.

The previous prime is 79691939. The next prime is 79691977. The reversal of 79691953 is 35919697.

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 79691953 - 2⁹ = 79691441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79691897 and 79691906.

It is not an unprimeable number, because it can be changed into a prime (79691923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3622351 + ... + 3622372.

It is an arithmetic number, because the mean of its divisors is an integer number (21734172).

Almost surely, 2^79691953 is an apocalyptic number.

It is an amenable number.

79691953 is a deficient number, since it is larger than the sum of its proper divisors (7244735).

79691953 is a wasteful number, since it uses less digits than its factorization.

79691953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7244734.

The product of its digits is 459270, while the sum is 49.

The square root of 79691953 is about 8927.0349500828. The cubic root of 79691953 is about 430.3331706680. Note that the first 3 decimals are identical.

The spelling of 79691953 in words is "seventy-nine million, six hundred ninety-one thousand, nine hundred fifty-three".