27872731 has 2 divisors, whose sum is σ = 27872732. Its totient is φ = 27872730.

The previous prime is 27872699. The next prime is 27872759. The reversal of 27872731 is 13727872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27872731 - 2⁵ = 27872699 is a prime.

It is a super-2 number, since 2×27872731² = 1553778266796722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27872431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13936365 + 13936366.

It is an arithmetic number, because the mean of its divisors is an integer number (13936366).

Almost surely, 2^27872731 is an apocalyptic number.

27872731 is a deficient number, since it is larger than the sum of its proper divisors (1).

27872731 is an equidigital number, since it uses as much as digits as its factorization.

27872731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32928, while the sum is 37.

The square root of 27872731 is about 5279.4631355849. The cubic root of 27872731 is about 303.1981225938.

The spelling of 27872731 in words is "twenty-seven million, eight hundred seventy-two thousand, seven hundred thirty-one".