79638251 has 32 divisors (see below), whose sum is σ = 106541568. Its totient is φ = 57623040.

The previous prime is 79638239. The next prime is 79638283. The reversal of 79638251 is 15283697.

It is a cyclic number.

It is not a de Polignac number, because 79638251 - 2⁶ = 79638187 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 79638199 and 79638208.

It is not an unprimeable number, because it can be changed into a prime (79638151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108281 + ... + 109013.

It is an arithmetic number, because the mean of its divisors is an integer number (3329424).

Almost surely, 2^79638251 is an apocalyptic number.

79638251 is a deficient number, since it is larger than the sum of its proper divisors (26903317).

79638251 is a wasteful number, since it uses less digits than its factorization.

79638251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851.

The product of its digits is 90720, while the sum is 41.

The square root of 79638251 is about 8924.0266135865. The cubic root of 79638251 is about 430.2364861054.

The spelling of 79638251 in words is "seventy-nine million, six hundred thirty-eight thousand, two hundred fifty-one".