27713731 has 4 divisors (see below), whose sum is σ = 27778464. Its totient is φ = 27649000.

The previous prime is 27713729. The next prime is 27713737. The reversal of 27713731 is 13731772.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27713731 - 2¹ = 27713729 is a prime.

It is a super-2 number, since 2×27713731² = 1536101771880722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27713693 and 27713702.

It is not an unprimeable number, because it can be changed into a prime (27713737) 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, 31720 + ... + 32581.

It is an arithmetic number, because the mean of its divisors is an integer number (6944616).

Almost surely, 2^27713731 is an apocalyptic number.

27713731 is a deficient number, since it is larger than the sum of its proper divisors (64733).

27713731 is an equidigital number, since it uses as much as digits as its factorization.

27713731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64732.

The product of its digits is 6174, while the sum is 31.

The square root of 27713731 is about 5264.3832497264. The cubic root of 27713731 is about 302.6204915801.

The spelling of 27713731 in words is "twenty-seven million, seven hundred thirteen thousand, seven hundred thirty-one".