27393979 has 2 divisors, whose sum is σ = 27393980. Its totient is φ = 27393978.

The previous prime is 27393973. The next prime is 27394007. The reversal of 27393979 is 97939372.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27393979 - 2⁹ = 27393467 is a prime.

It is not a weakly prime, because it can be changed into another prime (27393973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13696989 + 13696990.

It is an arithmetic number, because the mean of its divisors is an integer number (13696990).

Almost surely, 2^27393979 is an apocalyptic number.

27393979 is a deficient number, since it is larger than the sum of its proper divisors (1).

27393979 is an equidigital number, since it uses as much as digits as its factorization.

27393979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 642978, while the sum is 49.

The square root of 27393979 is about 5233.9257732605. The cubic root of 27393979 is about 301.4521410943.

The spelling of 27393979 in words is "twenty-seven million, three hundred ninety-three thousand, nine hundred seventy-nine".