79217313 has 16 divisors (see below), whose sum is σ = 125961216. Its totient is φ = 43298640.

The previous prime is 79217311. The next prime is 79217321. The reversal of 79217313 is 31371297.

It is a happy number.

It is not a de Polignac number, because 79217313 - 2¹ = 79217311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79217311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81523 + ... + 82488.

It is an arithmetic number, because the mean of its divisors is an integer number (7872576).

Almost surely, 2^79217313 is an apocalyptic number.

It is an amenable number.

79217313 is a deficient number, since it is larger than the sum of its proper divisors (46743903).

79217313 is a wasteful number, since it uses less digits than its factorization.

79217313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164044.

The product of its digits is 7938, while the sum is 33.

The square root of 79217313 is about 8900.4108332144. The cubic root of 79217313 is about 429.4771235935.

The spelling of 79217313 in words is "seventy-nine million, two hundred seventeen thousand, three hundred thirteen".