79779701 has 4 divisors (see below), whose sum is σ = 79800192. Its totient is φ = 79759212.

The previous prime is 79779673. The next prime is 79779731. The reversal of 79779701 is 10797797.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10797797 = 1061 ⋅10177.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79779701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79779731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2405 + ... + 12858.

It is an arithmetic number, because the mean of its divisors is an integer number (19950048).

Almost surely, 2^79779701 is an apocalyptic number.

It is an amenable number.

79779701 is a deficient number, since it is larger than the sum of its proper divisors (20491).

79779701 is a wasteful number, since it uses less digits than its factorization.

79779701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20490.

The product of its (nonzero) digits is 194481, while the sum is 47.

The square root of 79779701 is about 8931.9483316911. The cubic root of 79779701 is about 430.4910578939.

The spelling of 79779701 in words is "seventy-nine million, seven hundred seventy-nine thousand, seven hundred one".