79772431 has 4 divisors (see below), whose sum is σ = 83971000. Its totient is φ = 75573864.

The previous prime is 79772423. The next prime is 79772437. The reversal of 79772431 is 13427797.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13427797 = 241 ⋅55717.

It is a cyclic number.

It is not a de Polignac number, because 79772431 - 2³ = 79772423 is a prime.

It is a super-2 number, since 2×79772431² = 12727281495299522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79772437) 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, 2099256 + ... + 2099293.

It is an arithmetic number, because the mean of its divisors is an integer number (20992750).

Almost surely, 2^79772431 is an apocalyptic number.

79772431 is a deficient number, since it is larger than the sum of its proper divisors (4198569).

79772431 is a wasteful number, since it uses less digits than its factorization.

79772431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4198568.

The product of its digits is 74088, while the sum is 40.

The square root of 79772431 is about 8931.5413563393. The cubic root of 79772431 is about 430.4779811964.

The spelling of 79772431 in words is "seventy-nine million, seven hundred seventy-two thousand, four hundred thirty-one".