385266997 has 6 divisors (see below), whose sum is σ = 402746582. Its totient is φ = 368515752.

The previous prime is 385266989. The next prime is 385267013. The reversal of 385266997 is 799662583.

It can be written as a sum of positive squares in only one way, i.e., 246050596 + 139216401 = 15686^2 + 11799^2 .

It is not a de Polignac number, because 385266997 - 2³ = 385266989 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 (385266797) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 363618 + ... + 364675.

Almost surely, 2^385266997 is an apocalyptic number.

It is an amenable number.

385266997 is a deficient number, since it is larger than the sum of its proper divisors (17479585).

385266997 is an equidigital number, since it uses as much as digits as its factorization.

385266997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728339 (or 728316 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 55.

The square root of 385266997 is about 19628.2194047244. The cubic root of 385266997 is about 727.6467645154.

The spelling of 385266997 in words is "three hundred eighty-five million, two hundred sixty-six thousand, nine hundred ninety-seven".