39904433 has 2 divisors, whose sum is σ = 39904434. Its totient is φ = 39904432.

The previous prime is 39904429. The next prime is 39904441. The reversal of 39904433 is 33440993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39790864 + 113569 = 6308^2 + 337^2 .

It is a cyclic number.

It is not a de Polignac number, because 39904433 - 2² = 39904429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39904393 and 39904402.

It is not a weakly prime, because it can be changed into another prime (39904633) 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 as a sum of consecutive naturals, namely, 19952216 + 19952217.

It is an arithmetic number, because the mean of its divisors is an integer number (19952217).

Almost surely, 2^39904433 is an apocalyptic number.

It is an amenable number.

39904433 is a deficient number, since it is larger than the sum of its proper divisors (1).

39904433 is an equidigital number, since it uses as much as digits as its factorization.

39904433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 35.

The square root of 39904433 is about 6316.9955675147. The cubic root of 39904433 is about 341.7226100212.

The spelling of 39904433 in words is "thirty-nine million, nine hundred four thousand, four hundred thirty-three".