385508997 has 8 divisors (see below), whose sum is σ = 571124480. Its totient is φ = 257005980.

The previous prime is 385508989. The next prime is 385509001. The reversal of 385508997 is 799805583.

385508997 is a `hidden beast` number, since 3 + 8 + 550 + 89 + 9 + 7 = 666.

It is not a de Polignac number, because 385508997 - 2³ = 385508989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385508987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7139029 + ... + 7139082.

It is an arithmetic number, because the mean of its divisors is an integer number (71390560).

Almost surely, 2^385508997 is an apocalyptic number.

It is an amenable number.

385508997 is a deficient number, since it is larger than the sum of its proper divisors (185615483).

385508997 is a wasteful number, since it uses less digits than its factorization.

385508997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14278120 (or 14278114 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 54.

The square root of 385508997 is about 19634.3830307957. The cubic root of 385508997 is about 727.7990862920.

The spelling of 385508997 in words is "three hundred eighty-five million, five hundred eight thousand, nine hundred ninety-seven".