39159891 has 12 divisors (see below), whose sum is σ = 59891832. Its totient is φ = 24570816.

The previous prime is 39159877. The next prime is 39159917. The reversal of 39159891 is 19895193.

It is not a de Polignac number, because 39159891 - 2⁵ = 39159859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39159091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 127821 + ... + 128126.

It is an arithmetic number, because the mean of its divisors is an integer number (4990986).

Almost surely, 2^39159891 is an apocalyptic number.

39159891 is a deficient number, since it is larger than the sum of its proper divisors (20731941).

39159891 is a wasteful number, since it uses less digits than its factorization.

39159891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255970 (or 255967 counting only the distinct ones).

The product of its digits is 87480, while the sum is 45.

The square root of 39159891 is about 6257.7864297210. The cubic root of 39159891 is about 339.5839518860.

The spelling of 39159891 in words is "thirty-nine million, one hundred fifty-nine thousand, eight hundred ninety-one".