27310867921 has 2 divisors, whose sum is σ = 27310867922. Its totient is φ = 27310867920.

The previous prime is 27310867891. The next prime is 27310867963. The reversal of 27310867921 is 12976801372.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15064125696 + 12246742225 = 122736^2 + 110665^2 .

It is a cyclic number.

It is not a de Polignac number, because 27310867921 - 2²³ = 27302479313 is a prime.

It is not a weakly prime, because it can be changed into another prime (27310867721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13655433960 + 13655433961.

It is an arithmetic number, because the mean of its divisors is an integer number (13655433961).

Almost surely, 2^27310867921 is an apocalyptic number.

It is an amenable number.

27310867921 is a deficient number, since it is larger than the sum of its proper divisors (1).

27310867921 is an equidigital number, since it uses as much as digits as its factorization.

27310867921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 46.

The spelling of 27310867921 in words is "twenty-seven billion, three hundred ten million, eight hundred sixty-seven thousand, nine hundred twenty-one".