39539961 has 16 divisors (see below), whose sum is σ = 59685120. Its totient is φ = 25861680.

The previous prime is 39539959. The next prime is 39539987. The reversal of 39539961 is 16993593.

It is not a de Polignac number, because 39539961 - 2¹ = 39539959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39539561) 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, 12385 + ... + 15246.

It is an arithmetic number, because the mean of its divisors is an integer number (3730320).

Almost surely, 2^39539961 is an apocalyptic number.

It is an amenable number.

39539961 is a deficient number, since it is larger than the sum of its proper divisors (20145159).

39539961 is a wasteful number, since it uses less digits than its factorization.

39539961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27693 (or 27687 counting only the distinct ones).

The product of its digits is 196830, while the sum is 45.

The square root of 39539961 is about 6288.0808678006. The cubic root of 39539961 is about 340.6790379829.

The spelling of 39539961 in words is "thirty-nine million, five hundred thirty-nine thousand, nine hundred sixty-one".