423880657 has 2 divisors, whose sum is σ = 423880658. Its totient is φ = 423880656.

The previous prime is 423880619. The next prime is 423880679. The reversal of 423880657 is 756088324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 297183121 + 126697536 = 17239^2 + 11256^2 .

It is a cyclic number.

It is not a de Polignac number, because 423880657 - 2¹⁹ = 423356369 is a prime.

It is a super-2 number, since 2×423880657² = 359349622757503298, which contains 22 as substring.

It is equal to p_22539994 and since 423880657 and 22539994 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (423880687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211940328 + 211940329.

It is an arithmetic number, because the mean of its divisors is an integer number (211940329).

Almost surely, 2^423880657 is an apocalyptic number.

It is an amenable number.

423880657 is a deficient number, since it is larger than the sum of its proper divisors (1).

423880657 is an equidigital number, since it uses as much as digits as its factorization.

423880657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322560, while the sum is 43.

The square root of 423880657 is about 20588.3621738107. The cubic root of 423880657 is about 751.1866589453.

The spelling of 423880657 in words is "four hundred twenty-three million, eight hundred eighty thousand, six hundred fifty-seven".