27974477 has 2 divisors, whose sum is σ = 27974478. Its totient is φ = 27974476.

The previous prime is 27974461. The next prime is 27974483. The reversal of 27974477 is 77447972.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21104836 + 6869641 = 4594^2 + 2621^2 .

It is a cyclic number.

It is not a de Polignac number, because 27974477 - 2⁴ = 27974461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27974377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13987238 + 13987239.

It is an arithmetic number, because the mean of its divisors is an integer number (13987239).

Almost surely, 2^27974477 is an apocalyptic number.

It is an amenable number.

27974477 is a deficient number, since it is larger than the sum of its proper divisors (1).

27974477 is an equidigital number, since it uses as much as digits as its factorization.

27974477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 691488, while the sum is 47.

The square root of 27974477 is about 5289.0903754805. The cubic root of 27974477 is about 303.5666038291.

The spelling of 27974477 in words is "twenty-seven million, nine hundred seventy-four thousand, four hundred seventy-seven".