79425439 has 8 divisors (see below), whose sum is σ = 80608752. Its totient is φ = 78247680.

The previous prime is 79425433. The next prime is 79425449. The reversal of 79425439 is 93452497.

79425439 = 207² + 208² + ... + 627².

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 79425439 - 2⁵ = 79425407 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79425395 and 79425404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79425433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33807 + ... + 36079.

It is an arithmetic number, because the mean of its divisors is an integer number (10076094).

Almost surely, 2^79425439 is an apocalyptic number.

79425439 is a deficient number, since it is larger than the sum of its proper divisors (1183313).

79425439 is a wasteful number, since it uses less digits than its factorization.

79425439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2777.

The product of its digits is 272160, while the sum is 43.

The square root of 79425439 is about 8912.0950959917. The cubic root of 79425439 is about 429.8529134573.

The spelling of 79425439 in words is "seventy-nine million, four hundred twenty-five thousand, four hundred thirty-nine".