39919938031 has 4 divisors (see below), whose sum is σ = 40293021672. Its totient is φ = 39546854392.

The previous prime is 39919938029. The next prime is 39919938043. The reversal of 39919938031 is 13083991993.

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

It is a cyclic number.

It is not a de Polignac number, because 39919938031 - 2¹ = 39919938029 is a prime.

It is a super-2 number, since 2×39919938031² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39919936031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186541660 + ... + 186541873.

It is an arithmetic number, because the mean of its divisors is an integer number (10073255418).

Almost surely, 2^39919938031 is an apocalyptic number.

39919938031 is a deficient number, since it is larger than the sum of its proper divisors (373083641).

39919938031 is a wasteful number, since it uses less digits than its factorization.

39919938031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373083640.

The product of its (nonzero) digits is 1417176, while the sum is 55.

The spelling of 39919938031 in words is "thirty-nine billion, nine hundred nineteen million, nine hundred thirty-eight thousand, thirty-one".