39968207 has 16 divisors (see below), whose sum is σ = 44064000. Its totient is φ = 36088320.

The previous prime is 39968197. The next prime is 39968219. The reversal of 39968207 is 70286993.

It is a cyclic number.

It is not a de Polignac number, because 39968207 - 2²⁴ = 23190991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39968107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78269 + ... + 78777.

It is an arithmetic number, because the mean of its divisors is an integer number (2754000).

Almost surely, 2^39968207 is an apocalyptic number.

39968207 is a deficient number, since it is larger than the sum of its proper divisors (4095793).

39968207 is a wasteful number, since it uses less digits than its factorization.

39968207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 39968207 is about 6322.0413633573. The cubic root of 39968207 is about 341.9045565432.

The spelling of 39968207 in words is "thirty-nine million, nine hundred sixty-eight thousand, two hundred seven".