27097731 has 12 divisors (see below), whose sum is σ = 39223080. Its totient is φ = 18027360.

The previous prime is 27097699. The next prime is 27097769. The reversal of 27097731 is 13779072.

It is not a de Polignac number, because 27097731 - 2⁵ = 27097699 is a prime.

It is a super-2 number, since 2×27097731² = 1468574050696722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27097771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1800 + ... + 7578.

It is an arithmetic number, because the mean of its divisors is an integer number (3268590).

Almost surely, 2^27097731 is an apocalyptic number.

27097731 is a deficient number, since it is larger than the sum of its proper divisors (12125349).

27097731 is a wasteful number, since it uses less digits than its factorization.

27097731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6306 (or 6303 counting only the distinct ones).

The product of its (nonzero) digits is 18522, while the sum is 36.

The square root of 27097731 is about 5205.5480979432. The cubic root of 27097731 is about 300.3615308099.

It can be divided in two parts, 2709 and 7731, that added together give a triangular number (10440 = T₁₄₄).

The spelling of 27097731 in words is "twenty-seven million, ninety-seven thousand, seven hundred thirty-one".