39669975 has 36 divisors (see below), whose sum is σ = 71569576. Its totient is φ = 21003840.

The previous prime is 39669961. The next prime is 39669979. The reversal of 39669975 is 57996693.

It is not a de Polignac number, because 39669975 - 2⁵ = 39669943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39669979) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 34764 + ... + 35886.

Almost surely, 2^39669975 is an apocalyptic number.

39669975 is a deficient number, since it is larger than the sum of its proper divisors (31899601).

39669975 is a wasteful number, since it uses less digits than its factorization.

39669975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296 (or 1288 counting only the distinct ones).

The product of its digits is 2755620, while the sum is 54.

The square root of 39669975 is about 6298.4105137725. The cubic root of 39669975 is about 341.0520326628.

The spelling of 39669975 in words is "thirty-nine million, six hundred sixty-nine thousand, nine hundred seventy-five".