79270979 has 4 divisors (see below), whose sum is σ = 79315176. Its totient is φ = 79226784.

The previous prime is 79270967. The next prime is 79270991. The reversal of 79270979 is 97907297.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97907297 = 23 ⋅4256839.

It is an interprime number because it is at equal distance from previous prime (79270967) and next prime (79270991).

It is a cyclic number.

It is not a de Polignac number, because 79270979 - 2¹² = 79266883 is a prime.

It is a super-2 number, since 2×79270979² = 12567776223236882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79279979) 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, 19289 + ... + 23034.

It is an arithmetic number, because the mean of its divisors is an integer number (19828794).

Almost surely, 2^79270979 is an apocalyptic number.

79270979 is a deficient number, since it is larger than the sum of its proper divisors (44197).

79270979 is a wasteful number, since it uses less digits than its factorization.

79270979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44196.

The product of its (nonzero) digits is 500094, while the sum is 50.

The square root of 79270979 is about 8903.4251274439. The cubic root of 79270979 is about 429.5740852116.

The spelling of 79270979 in words is "seventy-nine million, two hundred seventy thousand, nine hundred seventy-nine".