27977923 has 2 divisors, whose sum is σ = 27977924. Its totient is φ = 27977922.

The previous prime is 27977897. The next prime is 27977981. The reversal of 27977923 is 32977972.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27977923 is a prime.

It is not a weakly prime, because it can be changed into another prime (27977023) 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, 13988961 + 13988962.

It is an arithmetic number, because the mean of its divisors is an integer number (13988962).

Almost surely, 2^27977923 is an apocalyptic number.

27977923 is a deficient number, since it is larger than the sum of its proper divisors (1).

27977923 is an equidigital number, since it uses as much as digits as its factorization.

27977923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 333396, while the sum is 46.

The square root of 27977923 is about 5289.4161303494. The cubic root of 27977923 is about 303.5790681379.

It can be divided in two parts, 2797792 and 3, that added together give a triangular number (2797795 = T₂₃₆₅).

The spelling of 27977923 in words is "twenty-seven million, nine hundred seventy-seven thousand, nine hundred twenty-three".