79231649 has 4 divisors (see below), whose sum is σ = 90550464. Its totient is φ = 67912836.

The previous prime is 79231601. The next prime is 79231657. The reversal of 79231649 is 94613297.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94613297 = 4057 ⋅23321.

It is a cyclic number.

It is not a de Polignac number, because 79231649 - 2²⁴ = 62454433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79231699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5659397 + ... + 5659410.

It is an arithmetic number, because the mean of its divisors is an integer number (22637616).

Almost surely, 2^79231649 is an apocalyptic number.

It is an amenable number.

79231649 is a deficient number, since it is larger than the sum of its proper divisors (11318815).

79231649 is a wasteful number, since it uses less digits than its factorization.

79231649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11318814.

The product of its digits is 81648, while the sum is 41.

The square root of 79231649 is about 8901.2161528636. The cubic root of 79231649 is about 429.5030295999.

The spelling of 79231649 in words is "seventy-nine million, two hundred thirty-one thousand, six hundred forty-nine".