27139791 has 8 divisors (see below), whose sum is σ = 41355904. Its totient is φ = 15508440.

The previous prime is 27139781. The next prime is 27139799. The reversal of 27139791 is 19793172.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27139791 - 2¹⁰ = 27138767 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 (27139799) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 646165 + ... + 646206.

It is an arithmetic number, because the mean of its divisors is an integer number (5169488).

Almost surely, 2^27139791 is an apocalyptic number.

27139791 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

27139791 is a deficient number, since it is larger than the sum of its proper divisors (14216113).

27139791 is a wasteful number, since it uses less digits than its factorization.

27139791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292381.

The product of its digits is 23814, while the sum is 39.

The square root of 27139791 is about 5209.5864519173. The cubic root of 27139791 is about 300.5168534747.

The spelling of 27139791 in words is "twenty-seven million, one hundred thirty-nine thousand, seven hundred ninety-one".