79697391 has 8 divisors (see below), whose sum is σ = 106417584. Its totient is φ = 53054400.

The previous prime is 79697389. The next prime is 79697393. The reversal of 79697391 is 19379697.

It is an interprime number because it is at equal distance from previous prime (79697389) and next prime (79697393).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 79697391 - 2¹ = 79697389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79697393) 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 7 ways as a sum of consecutive naturals, for example, 16846 + ... + 21051.

It is an arithmetic number, because the mean of its divisors is an integer number (13302198).

Almost surely, 2^79697391 is an apocalyptic number.

79697391 is a deficient number, since it is larger than the sum of its proper divisors (26720193).

79697391 is a wasteful number, since it uses less digits than its factorization.

79697391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38601.

The product of its digits is 642978, while the sum is 51.

The square root of 79697391 is about 8927.3395253009. The cubic root of 79697391 is about 430.3429587686.

The spelling of 79697391 in words is "seventy-nine million, six hundred ninety-seven thousand, three hundred ninety-one".