39992991 has 8 divisors (see below), whose sum is σ = 53365680. Its totient is φ = 26641152.

The previous prime is 39992989. The next prime is 39993029. The reversal of 39992991 is 19929993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 39992991 - 2¹ = 39992989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39992291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15 + ... + 8943.

It is an arithmetic number, because the mean of its divisors is an integer number (6670710).

Almost surely, 2^39992991 is an apocalyptic number.

39992991 is a deficient number, since it is larger than the sum of its proper divisors (13372689).

39992991 is a wasteful number, since it uses less digits than its factorization.

39992991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10425.

The product of its digits is 354294, while the sum is 51.

The square root of 39992991 is about 6324.0011859581. The cubic root of 39992991 is about 341.9752127995.

The spelling of 39992991 in words is "thirty-nine million, nine hundred ninety-two thousand, nine hundred ninety-one".