391203113 has 24 divisors (see below), whose sum is σ = 481645440. Its totient is φ = 316155840.

The previous prime is 391203107. The next prime is 391203139. The reversal of 391203113 is 311302193.

It is not a de Polignac number, because 391203113 - 2⁶ = 391203049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (391203193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77573 + ... + 82461.

It is an arithmetic number, because the mean of its divisors is an integer number (20068560).

Almost surely, 2^391203113 is an apocalyptic number.

It is an amenable number.

391203113 is a deficient number, since it is larger than the sum of its proper divisors (90442327).

391203113 is a wasteful number, since it uses less digits than its factorization.

391203113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4997 (or 4990 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 391203113 is about 19778.8551994295. The cubic root of 391203113 is about 731.3648781654.

The spelling of 391203113 in words is "three hundred ninety-one million, two hundred three thousand, one hundred thirteen".