39968231 has 4 divisors (see below), whose sum is σ = 40273464. Its totient is φ = 39663000.

The previous prime is 39968221. The next prime is 39968249. The reversal of 39968231 is 13286993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13286993 = 41 ⋅324073.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39968231 is a prime.

It is a super-2 number, since 2×39968231² = 3194918978538722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39968221) 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, 152420 + ... + 152681.

It is an arithmetic number, because the mean of its divisors is an integer number (10068366).

Almost surely, 2^39968231 is an apocalyptic number.

39968231 is a deficient number, since it is larger than the sum of its proper divisors (305233).

39968231 is a wasteful number, since it uses less digits than its factorization.

39968231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305232.

The product of its digits is 69984, while the sum is 41.

The square root of 39968231 is about 6322.0432614780. The cubic root of 39968231 is about 341.9046249785.

The spelling of 39968231 in words is "thirty-nine million, nine hundred sixty-eight thousand, two hundred thirty-one".