39923031 has 4 divisors (see below), whose sum is σ = 53230712. Its totient is φ = 26615352.

The previous prime is 39923029. The next prime is 39923119. The reversal of 39923031 is 13032993.

39923031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 39923031 - 2¹ = 39923029 is a prime.

It is a super-2 number, since 2×39923031² = 3187696808453922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 39923031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39923231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6653836 + ... + 6653841.

It is an arithmetic number, because the mean of its divisors is an integer number (13307678).

Almost surely, 2^39923031 is an apocalyptic number.

39923031 is a deficient number, since it is larger than the sum of its proper divisors (13307681).

39923031 is a wasteful number, since it uses less digits than its factorization.

39923031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13307680.

The product of its (nonzero) digits is 4374, while the sum is 30.

The square root of 39923031 is about 6318.4674565910. The cubic root of 39923031 is about 341.7756899219.

The spelling of 39923031 in words is "thirty-nine million, nine hundred twenty-three thousand, thirty-one".