47904449 has 2 divisors, whose sum is σ = 47904450. Its totient is φ = 47904448.

The previous prime is 47904431. The next prime is 47904509. The reversal of 47904449 is 94440974.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43033600 + 4870849 = 6560^2 + 2207^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47904449 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (47904049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23952224 + 23952225.

It is an arithmetic number, because the mean of its divisors is an integer number (23952225).

Almost surely, 2^47904449 is an apocalyptic number.

It is an amenable number.

47904449 is a deficient number, since it is larger than the sum of its proper divisors (1).

47904449 is an equidigital number, since it uses as much as digits as its factorization.

47904449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 47904449 is about 6921.3039956355. The cubic root of 47904449 is about 363.1828088056.

The spelling of 47904449 in words is "forty-seven million, nine hundred four thousand, four hundred forty-nine".