388349923 has 4 divisors (see below), whose sum is σ = 418223008. Its totient is φ = 358476840.

The previous prime is 388349903. The next prime is 388349947. The reversal of 388349923 is 329943883.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 329943883 = 139 ⋅2373697.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-388349923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (388349903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14936523 + ... + 14936548.

It is an arithmetic number, because the mean of its divisors is an integer number (104555752).

Almost surely, 2^388349923 is an apocalyptic number.

388349923 is a deficient number, since it is larger than the sum of its proper divisors (29873085).

388349923 is a wasteful number, since it uses less digits than its factorization.

388349923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29873084.

The product of its digits is 1119744, while the sum is 49.

The square root of 388349923 is about 19706.5959262375. The cubic root of 388349923 is about 729.5824991183.

The spelling of 388349923 in words is "three hundred eighty-eight million, three hundred forty-nine thousand, nine hundred twenty-three".