385257629 has 2 divisors, whose sum is σ = 385257630. Its totient is φ = 385257628.

The previous prime is 385257599. The next prime is 385257667. The reversal of 385257629 is 926752583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 277056025 + 108201604 = 16645^2 + 10402^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-385257629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385253629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192628814 + 192628815.

It is an arithmetic number, because the mean of its divisors is an integer number (192628815).

Almost surely, 2^385257629 is an apocalyptic number.

It is an amenable number.

385257629 is a deficient number, since it is larger than the sum of its proper divisors (1).

385257629 is an equidigital number, since it uses as much as digits as its factorization.

385257629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 907200, while the sum is 47.

The square root of 385257629 is about 19627.9807672618. The cubic root of 385257629 is about 727.6408667439.

The spelling of 385257629 in words is "three hundred eighty-five million, two hundred fifty-seven thousand, six hundred twenty-nine".