387297657 has 12 divisors (see below), whose sum is σ = 559600704. Its totient is φ = 258119640.

The previous prime is 387297649. The next prime is 387297679. The reversal of 387297657 is 756792783.

It is not a de Polignac number, because 387297657 - 2³ = 387297649 is a prime.

It is a super-3 number, since 3×387297657³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (387297607) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52932 + ... + 59802.

It is an arithmetic number, because the mean of its divisors is an integer number (46633392).

Almost surely, 2^387297657 is an apocalyptic number.

It is an amenable number.

387297657 is a deficient number, since it is larger than the sum of its proper divisors (172303047).

387297657 is a wasteful number, since it uses less digits than its factorization.

387297657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13140 (or 13137 counting only the distinct ones).

The product of its digits is 4445280, while the sum is 54.

The square root of 387297657 is about 19679.8794965823. The cubic root of 387297657 is about 728.9229484969.

The spelling of 387297657 in words is "three hundred eighty-seven million, two hundred ninety-seven thousand, six hundred fifty-seven".