39968319 has 8 divisors (see below), whose sum is σ = 55608192. Its totient is φ = 25487000.

The previous prime is 39968281. The next prime is 39968323. The reversal of 39968319 is 91386993.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 39968319 - 2⁸ = 39968063 is a prime.

It is a super-2 number, since 2×39968319² = 3194933047371522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39968339) 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, 289557 + ... + 289694.

It is an arithmetic number, because the mean of its divisors is an integer number (6951024).

Almost surely, 2^39968319 is an apocalyptic number.

39968319 is a deficient number, since it is larger than the sum of its proper divisors (15639873).

39968319 is a wasteful number, since it uses less digits than its factorization.

39968319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579277.

The product of its digits is 314928, while the sum is 48.

The square root of 39968319 is about 6322.0502212494. The cubic root of 39968319 is about 341.9048759077.

The spelling of 39968319 in words is "thirty-nine million, nine hundred sixty-eight thousand, three hundred nineteen".