79939749 has 8 divisors (see below), whose sum is σ = 108393120. Its totient is φ = 52389776.

The previous prime is 79939733. The next prime is 79939757. The reversal of 79939749 is 94793997.

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 79939749 - 2⁴ = 79939733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79939759) 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, 225642 + ... + 225995.

It is an arithmetic number, because the mean of its divisors is an integer number (13549140).

Almost surely, 2^79939749 is an apocalyptic number.

It is an amenable number.

79939749 is a deficient number, since it is larger than the sum of its proper divisors (28453371).

79939749 is a wasteful number, since it uses less digits than its factorization.

79939749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451699.

The product of its digits is 3857868, while the sum is 57.

The square root of 79939749 is about 8940.9031423006. The cubic root of 79939749 is about 430.7787384684.

The spelling of 79939749 in words is "seventy-nine million, nine hundred thirty-nine thousand, seven hundred forty-nine".