79740399 has 16 divisors (see below), whose sum is σ = 107458560. Its totient is φ = 52595040.

The previous prime is 79740377. The next prime is 79740403. The reversal of 79740399 is 99304797.

It is not a de Polignac number, because 79740399 - 2¹⁶ = 79674863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79740599) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181422 + ... + 181860.

It is an arithmetic number, because the mean of its divisors is an integer number (6716160).

Almost surely, 2^79740399 is an apocalyptic number.

79740399 is a deficient number, since it is larger than the sum of its proper divisors (27718161).

79740399 is a wasteful number, since it uses less digits than its factorization.

79740399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950.

The product of its (nonzero) digits is 428652, while the sum is 48.

The square root of 79740399 is about 8929.7479807663. The cubic root of 79740399 is about 430.4203551194.

The spelling of 79740399 in words is "seventy-nine million, seven hundred forty thousand, three hundred ninety-nine".