27920887 has 2 divisors, whose sum is σ = 27920888. Its totient is φ = 27920886.

The previous prime is 27920857. The next prime is 27920909. The reversal of 27920887 is 78802972.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27920887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27920807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13960443 + 13960444.

It is an arithmetic number, because the mean of its divisors is an integer number (13960444).

Almost surely, 2^27920887 is an apocalyptic number.

27920887 is a deficient number, since it is larger than the sum of its proper divisors (1).

27920887 is an equidigital number, since it uses as much as digits as its factorization.

27920887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 27920887 is about 5284.0218583954. The cubic root of 27920887 is about 303.3726349538.

The spelling of 27920887 in words is "twenty-seven million, nine hundred twenty thousand, eight hundred eighty-seven".