39008991 has 16 divisors (see below), whose sum is σ = 59531264. Its totient is φ = 22257504.

The previous prime is 39008953. The next prime is 39008993. The reversal of 39008991 is 19980093.

It is not a de Polignac number, because 39008991 - 2¹⁹ = 38484703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39008993) 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, 22626 + ... + 24288.

It is an arithmetic number, because the mean of its divisors is an integer number (3720704).

Almost surely, 2^39008991 is an apocalyptic number.

39008991 is a deficient number, since it is larger than the sum of its proper divisors (20522273).

39008991 is a wasteful number, since it uses less digits than its factorization.

39008991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2790.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 39008991 is about 6245.7178130300. The cubic root of 39008991 is about 339.1472024547.

The spelling of 39008991 in words is "thirty-nine million, eight thousand, nine hundred ninety-one".