388393013 has 4 divisors (see below), whose sum is σ = 388550688. Its totient is φ = 388235340.

The previous prime is 388393009. The next prime is 388393021. The reversal of 388393013 is 310393883.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 310393883 = 73 ⋅4251971.

It is a cyclic number.

It is not a de Polignac number, because 388393013 - 2² = 388393009 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 (388393073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75083 + ... + 80088.

It is an arithmetic number, because the mean of its divisors is an integer number (97137672).

Almost surely, 2^388393013 is an apocalyptic number.

It is an amenable number.

388393013 is a deficient number, since it is larger than the sum of its proper divisors (157675).

388393013 is a wasteful number, since it uses less digits than its factorization.

388393013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157674.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 388393013 is about 19707.6891846812. The cubic root of 388393013 is about 729.6094821263.

The spelling of 388393013 in words is "three hundred eighty-eight million, three hundred ninety-three thousand, thirteen".