27553979 has 2 divisors, whose sum is σ = 27553980. Its totient is φ = 27553978.

The previous prime is 27553969. The next prime is 27553987. The reversal of 27553979 is 97935572.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27553979 - 2⁴ = 27553963 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (27553909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13776989 + 13776990.

It is an arithmetic number, because the mean of its divisors is an integer number (13776990).

Almost surely, 2^27553979 is an apocalyptic number.

27553979 is a deficient number, since it is larger than the sum of its proper divisors (1).

27553979 is an equidigital number, since it uses as much as digits as its factorization.

27553979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 595350, while the sum is 47.

The square root of 27553979 is about 5249.1884134597. The cubic root of 27553979 is about 302.0378992830.

The spelling of 27553979 in words is "twenty-seven million, five hundred fifty-three thousand, nine hundred seventy-nine".