27979497 has 48 divisors (see below), whose sum is σ = 50319360. Its totient is φ = 14587776.

The previous prime is 27979489. The next prime is 27979517. The reversal of 27979497 is 79497972.

It is not a de Polignac number, because 27979497 - 2³ = 27979489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27979417) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 103879 + ... + 104147.

It is an arithmetic number, because the mean of its divisors is an integer number (1048320).

Almost surely, 2^27979497 is an apocalyptic number.

It is an amenable number.

27979497 is a deficient number, since it is larger than the sum of its proper divisors (22339863).

27979497 is a wasteful number, since it uses less digits than its factorization.

27979497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422 (or 419 counting only the distinct ones).

The product of its digits is 2000376, while the sum is 54.

The square root of 27979497 is about 5289.5649159454. The cubic root of 27979497 is about 303.5847610134.

The spelling of 27979497 in words is "twenty-seven million, nine hundred seventy-nine thousand, four hundred ninety-seven".