39990497 has 6 divisors (see below), whose sum is σ = 42206418. Its totient is φ = 37885392.

The previous prime is 39990487. The next prime is 39990521. The reversal of 39990497 is 79409993.

It can be written as a sum of positive squares in only one way, i.e., 26122321 + 13868176 = 5111^2 + 3724^2 .

It is not a de Polignac number, because 39990497 - 2⁸ = 39990241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39990487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55028 + ... + 55749.

It is an arithmetic number, because the mean of its divisors is an integer number (7034403).

Almost surely, 2^39990497 is an apocalyptic number.

It is an amenable number.

39990497 is a deficient number, since it is larger than the sum of its proper divisors (2215921).

39990497 is a wasteful number, since it uses less digits than its factorization.

39990497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110815 (or 110796 counting only the distinct ones).

The product of its (nonzero) digits is 551124, while the sum is 50.

The square root of 39990497 is about 6323.8039975951. The cubic root of 39990497 is about 341.9681040213.

The spelling of 39990497 in words is "thirty-nine million, nine hundred ninety thousand, four hundred ninety-seven".