39669965 has 8 divisors (see below), whose sum is σ = 47920128. Its totient is φ = 31525200.

The previous prime is 39669961. The next prime is 39669979. The reversal of 39669965 is 56996693.

39669965 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 39669965 - 2² = 39669961 is a prime.

It is a super-2 number, since 2×39669965² = 3147412246202450, 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 (39669961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25517 + ... + 27026.

It is an arithmetic number, because the mean of its divisors is an integer number (5990016).

Almost surely, 2^39669965 is an apocalyptic number.

It is an amenable number.

39669965 is a deficient number, since it is larger than the sum of its proper divisors (8250163).

39669965 is a wasteful number, since it uses less digits than its factorization.

39669965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52699.

The product of its digits is 2361960, while the sum is 53.

The square root of 39669965 is about 6298.4097199214. The cubic root of 39669965 is about 341.0520040054.

It can be divided in two parts, 3966 and 9965, that added together give a palindrome (13931).

The spelling of 39669965 in words is "thirty-nine million, six hundred sixty-nine thousand, nine hundred sixty-five".