79202971 has 4 divisors (see below), whose sum is σ = 79252992. Its totient is φ = 79152952.

The previous prime is 79202953. The next prime is 79202987. The reversal of 79202971 is 17920297.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17920297 = 139 ⋅128923.

It is a cyclic number.

It is not a de Polignac number, because 79202971 - 2¹³ = 79194779 is a prime.

It is a super-2 number, since 2×79202971² = 12546221230453682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79202971.

It is not an unprimeable number, because it can be changed into a prime (79262971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22555 + ... + 25828.

It is an arithmetic number, because the mean of its divisors is an integer number (19813248).

Almost surely, 2^79202971 is an apocalyptic number.

79202971 is a deficient number, since it is larger than the sum of its proper divisors (50021).

79202971 is a wasteful number, since it uses less digits than its factorization.

79202971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50020.

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 79202971 is about 8899.6051035987. The cubic root of 79202971 is about 429.4512036170.

It can be divided in two parts, 792029 and 71, that added together give a square (792100 = 890²).

The spelling of 79202971 in words is "seventy-nine million, two hundred two thousand, nine hundred seventy-one".