79639005 has 16 divisors (see below), whose sum is σ = 128686464. Its totient is φ = 42052800.

The previous prime is 79639003. The next prime is 79639039. The reversal of 79639005 is 50093697.

It is not a de Polignac number, because 79639005 - 2¹ = 79639003 is a prime.

It is a super-2 number, since 2×79639005² = 12684742234780050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79639003) 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 15 ways as a sum of consecutive naturals, for example, 24769 + ... + 27798.

It is an arithmetic number, because the mean of its divisors is an integer number (8042904).

Almost surely, 2^79639005 is an apocalyptic number.

It is an amenable number.

79639005 is a deficient number, since it is larger than the sum of its proper divisors (49047459).

79639005 is a wasteful number, since it uses less digits than its factorization.

79639005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52676.

The product of its (nonzero) digits is 51030, while the sum is 39.

The square root of 79639005 is about 8924.0688589903. The cubic root of 79639005 is about 430.2378439005.

The spelling of 79639005 in words is "seventy-nine million, six hundred thirty-nine thousand, five".