27139497 has 32 divisors (see below), whose sum is σ = 47775744. Its totient is φ = 13267200.

The previous prime is 27139481. The next prime is 27139501. The reversal of 27139497 is 79493172.

It is not a de Polignac number, because 27139497 - 2⁴ = 27139481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27139397) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 472 + ... + 7382.

It is an arithmetic number, because the mean of its divisors is an integer number (1492992).

Almost surely, 2^27139497 is an apocalyptic number.

It is an amenable number.

27139497 is a deficient number, since it is larger than the sum of its proper divisors (20636247).

27139497 is a wasteful number, since it uses less digits than its factorization.

27139497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6949.

The product of its digits is 95256, while the sum is 42.

The square root of 27139497 is about 5209.5582346299. The cubic root of 27139497 is about 300.5157683242.

The spelling of 27139497 in words is "twenty-seven million, one hundred thirty-nine thousand, four hundred ninety-seven".