388113549 has 4 divisors (see below), whose sum is σ = 517484736. Its totient is φ = 258742364.

The previous prime is 388113527. The next prime is 388113617. The reversal of 388113549 is 945311883.

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.

It is a cyclic number.

It is not a de Polignac number, because 388113549 - 2¹² = 388109453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 388113549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388113449) 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, 64685589 + ... + 64685594.

It is an arithmetic number, because the mean of its divisors is an integer number (129371184).

Almost surely, 2^388113549 is an apocalyptic number.

It is an amenable number.

388113549 is a deficient number, since it is larger than the sum of its proper divisors (129371187).

388113549 is a wasteful number, since it uses less digits than its factorization.

388113549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129371186.

The product of its digits is 103680, while the sum is 42.

The square root of 388113549 is about 19700.5976812888. The cubic root of 388113549 is about 729.4344459288.

The spelling of 388113549 in words is "three hundred eighty-eight million, one hundred thirteen thousand, five hundred forty-nine".