427921057 has 2 divisors, whose sum is σ = 427921058. Its totient is φ = 427921056.

The previous prime is 427921037. The next prime is 427921069. The reversal of 427921057 is 750129724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 367718976 + 60202081 = 19176^2 + 7759^2 .

It is a cyclic number.

It is not a de Polignac number, because 427921057 - 2¹⁵ = 427888289 is a prime.

It is not a weakly prime, because it can be changed into another prime (427921037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213960528 + 213960529.

It is an arithmetic number, because the mean of its divisors is an integer number (213960529).

Almost surely, 2^427921057 is an apocalyptic number.

It is an amenable number.

427921057 is a deficient number, since it is larger than the sum of its proper divisors (1).

427921057 is an equidigital number, since it uses as much as digits as its factorization.

427921057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 427921057 is about 20686.2528506252. The cubic root of 427921057 is about 753.5658678390.

The spelling of 427921057 in words is "four hundred twenty-seven million, nine hundred twenty-one thousand, fifty-seven".