39969505 has 16 divisors (see below), whose sum is σ = 49238784. Its totient is φ = 31132800.

The previous prime is 39969493. The next prime is 39969539. The reversal of 39969505 is 50596993.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-39969505 is a prime.

It is a super-2 number, since 2×39969505² = 3195122659890050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66205 + ... + 66805.

It is an arithmetic number, because the mean of its divisors is an integer number (3077424).

Almost surely, 2^39969505 is an apocalyptic number.

It is an amenable number.

39969505 is a deficient number, since it is larger than the sum of its proper divisors (9269279).

39969505 is a wasteful number, since it uses less digits than its factorization.

39969505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936.

The product of its (nonzero) digits is 328050, while the sum is 46.

The square root of 39969505 is about 6322.1440192390. The cubic root of 39969505 is about 341.9082577126.

The spelling of 39969505 in words is "thirty-nine million, nine hundred sixty-nine thousand, five hundred five".