39031139 has 24 divisors (see below), whose sum is σ = 47637504. Its totient is φ = 31291200.

The previous prime is 39031123. The next prime is 39031141. The reversal of 39031139 is 93113093.

It is not a de Polignac number, because 39031139 - 2⁴ = 39031123 is a prime.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39031169) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 364724 + ... + 364830.

It is an arithmetic number, because the mean of its divisors is an integer number (1984896).

Almost surely, 2^39031139 is an apocalyptic number.

39031139 is a deficient number, since it is larger than the sum of its proper divisors (8606365).

39031139 is a wasteful number, since it uses less digits than its factorization.

39031139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227 (or 186 counting only the distinct ones).

The product of its (nonzero) digits is 2187, while the sum is 29.

The square root of 39031139 is about 6247.4906162395. The cubic root of 39031139 is about 339.2113757894.

The spelling of 39031139 in words is "thirty-nine million, thirty-one thousand, one hundred thirty-nine".