79689251 has 8 divisors (see below), whose sum is σ = 87099264. Its totient is φ = 72581760.

The previous prime is 79689229. The next prime is 79689289. The reversal of 79689251 is 15298697.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79689251 - 2¹⁰ = 79688227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79689196 and 79689205.

It is not an unprimeable number, because it can be changed into a prime (79689221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75080 + ... + 76133.

It is an arithmetic number, because the mean of its divisors is an integer number (10887408).

Almost surely, 2^79689251 is an apocalyptic number.

79689251 is a deficient number, since it is larger than the sum of its proper divisors (7410013).

79689251 is a wasteful number, since it uses less digits than its factorization.

79689251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151261.

The product of its digits is 272160, while the sum is 47.

The square root of 79689251 is about 8926.8836107569. The cubic root of 79689251 is about 430.3283070512.

The spelling of 79689251 in words is "seventy-nine million, six hundred eighty-nine thousand, two hundred fifty-one".