927666721 has 2 divisors, whose sum is σ = 927666722. Its totient is φ = 927666720.

The previous prime is 927666713. The next prime is 927666737. The reversal of 927666721 is 127666729.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 825757696 + 101909025 = 28736^2 + 10095^2 .

It is a cyclic number.

It is not a de Polignac number, because 927666721 - 2³ = 927666713 is a prime.

It is not a weakly prime, because it can be changed into another prime (927666221) 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, 463833360 + 463833361.

It is an arithmetic number, because the mean of its divisors is an integer number (463833361).

Almost surely, 2^927666721 is an apocalyptic number.

It is an amenable number.

927666721 is a deficient number, since it is larger than the sum of its proper divisors (1).

927666721 is an equidigital number, since it uses as much as digits as its factorization.

927666721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 46.

The square root of 927666721 is about 30457.6217226493. The cubic root of 927666721 is about 975.2830108960.

The spelling of 927666721 in words is "nine hundred twenty-seven million, six hundred sixty-six thousand, seven hundred twenty-one".