39939291 has 16 divisors (see below), whose sum is σ = 67622400. Its totient is φ = 22822344.

The previous prime is 39939281. The next prime is 39939329. The reversal of 39939291 is 19293993.

It is not a de Polignac number, because 39939291 - 2¹⁰ = 39938267 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39939271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105471 + ... + 105848.

It is an arithmetic number, because the mean of its divisors is an integer number (4226400).

Almost surely, 2^39939291 is an apocalyptic number.

39939291 is a deficient number, since it is larger than the sum of its proper divisors (27683109).

39939291 is a wasteful number, since it uses less digits than its factorization.

39939291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211335 (or 211329 counting only the distinct ones).

The product of its digits is 118098, while the sum is 45.

The square root of 39939291 is about 6319.7540300236. The cubic root of 39939291 is about 341.8220835139.

The spelling of 39939291 in words is "thirty-nine million, nine hundred thirty-nine thousand, two hundred ninety-one".