385630657 has 2 divisors, whose sum is σ = 385630658. Its totient is φ = 385630656.

The previous prime is 385630643. The next prime is 385630697. The reversal of 385630657 is 756036583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199826496 + 185804161 = 14136^2 + 13631^2 .

It is a cyclic number.

It is not a de Polignac number, because 385630657 - 2⁷ = 385630529 is a prime.

It is a super-2 number, since 2×385630657² = 297422007236503298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (385630697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192815328 + 192815329.

It is an arithmetic number, because the mean of its divisors is an integer number (192815329).

Almost surely, 2^385630657 is an apocalyptic number.

It is an amenable number.

385630657 is a deficient number, since it is larger than the sum of its proper divisors (1).

385630657 is an equidigital number, since it uses as much as digits as its factorization.

385630657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 453600, while the sum is 43.

The square root of 385630657 is about 19637.4809229697. The cubic root of 385630657 is about 727.8756385254.

The spelling of 385630657 in words is "three hundred eighty-five million, six hundred thirty thousand, six hundred fifty-seven".