39171393 has 6 divisors (see below), whose sum is σ = 56580914. Its totient is φ = 26114256.

The previous prime is 39171371. The next prime is 39171397. The reversal of 39171393 is 39317193.

It can be written as a sum of positive squares in only one way, i.e., 38155329 + 1016064 = 6177^2 + 1008^2 .

It is not a de Polignac number, because 39171393 - 2⁵ = 39171361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39171397) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2176180 + ... + 2176197.

Almost surely, 2^39171393 is an apocalyptic number.

It is an amenable number.

39171393 is a deficient number, since it is larger than the sum of its proper divisors (17409521).

39171393 is a wasteful number, since it uses less digits than its factorization.

39171393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4352383 (or 4352380 counting only the distinct ones).

The product of its digits is 15309, while the sum is 36.

The square root of 39171393 is about 6258.7053773125. The cubic root of 39171393 is about 339.6171960393.

The spelling of 39171393 in words is "thirty-nine million, one hundred seventy-one thousand, three hundred ninety-three".