385850557 has 2 divisors, whose sum is σ = 385850558. Its totient is φ = 385850556.

The previous prime is 385850519. The next prime is 385850609. The reversal of 385850557 is 755058583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 358193476 + 27657081 = 18926^2 + 5259^2 .

It is a cyclic number.

It is not a de Polignac number, because 385850557 - 2⁷ = 385850429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385850957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192925278 + 192925279.

It is an arithmetic number, because the mean of its divisors is an integer number (192925279).

Almost surely, 2^385850557 is an apocalyptic number.

It is an amenable number.

385850557 is a deficient number, since it is larger than the sum of its proper divisors (1).

385850557 is an equidigital number, since it uses as much as digits as its factorization.

385850557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840000, while the sum is 46.

The square root of 385850557 is about 19643.0791119926. The cubic root of 385850557 is about 728.0139655625.

The spelling of 385850557 in words is "three hundred eighty-five million, eight hundred fifty thousand, five hundred fifty-seven".