27939487 has 2 divisors, whose sum is σ = 27939488. Its totient is φ = 27939486.

The previous prime is 27939473. The next prime is 27939497. The reversal of 27939487 is 78493972.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27939487 - 2¹⁵ = 27906719 is a prime.

It is a super-2 number, since 2×27939487² = 1561229867646338, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27939487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27939497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13969743 + 13969744.

It is an arithmetic number, because the mean of its divisors is an integer number (13969744).

Almost surely, 2^27939487 is an apocalyptic number.

27939487 is a deficient number, since it is larger than the sum of its proper divisors (1).

27939487 is an equidigital number, since it uses as much as digits as its factorization.

27939487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 49.

The square root of 27939487 is about 5285.7815883746. The cubic root of 27939487 is about 303.4399857089.

The spelling of 27939487 in words is "twenty-seven million, nine hundred thirty-nine thousand, four hundred eighty-seven".