39931373 has 2 divisors, whose sum is σ = 39931374. Its totient is φ = 39931372.

The previous prime is 39931361. The next prime is 39931457. The reversal of 39931373 is 37313993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31561924 + 8369449 = 5618^2 + 2893^2 .

It is an emirp because it is prime and its reverse (37313993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39931373 - 2⁴ = 39931357 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39931303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19965686 + 19965687.

It is an arithmetic number, because the mean of its divisors is an integer number (19965687).

Almost surely, 2^39931373 is an apocalyptic number.

It is an amenable number.

39931373 is a deficient number, since it is larger than the sum of its proper divisors (1).

39931373 is an equidigital number, since it uses as much as digits as its factorization.

39931373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45927, while the sum is 38.

The square root of 39931373 is about 6319.1275505405. The cubic root of 39931373 is about 341.7994931768.

It can be divided in two parts, 39931 and 373, that added together give a palindrome (40304).

The spelling of 39931373 in words is "thirty-nine million, nine hundred thirty-one thousand, three hundred seventy-three".