39913491 has 8 divisors (see below), whose sum is σ = 54656464. Its totient is φ = 25889760.

The previous prime is 39913477. The next prime is 39913493. The reversal of 39913491 is 19431993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-39913491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39913493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179680 + ... + 179901.

It is an arithmetic number, because the mean of its divisors is an integer number (6832058).

Almost surely, 2^39913491 is an apocalyptic number.

39913491 is a deficient number, since it is larger than the sum of its proper divisors (14742973).

39913491 is a wasteful number, since it uses less digits than its factorization.

39913491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359621.

The product of its digits is 26244, while the sum is 39.

The square root of 39913491 is about 6317.7124815870. The cubic root of 39913491 is about 341.7484642016.

It can be divided in two parts, 39913 and 491, that added together give a palindrome (40404).

The spelling of 39913491 in words is "thirty-nine million, nine hundred thirteen thousand, four hundred ninety-one".