49617409 has 2 divisors, whose sum is σ = 49617410. Its totient is φ = 49617408.

The previous prime is 49617401. The next prime is 49617413. The reversal of 49617409 is 90471694.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43191184 + 6426225 = 6572^2 + 2535^2 .

It is a cyclic number.

It is not a de Polignac number, because 49617409 - 2³ = 49617401 is a prime.

It is not a weakly prime, because it can be changed into another prime (49617401) 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, 24808704 + 24808705.

It is an arithmetic number, because the mean of its divisors is an integer number (24808705).

Almost surely, 2^49617409 is an apocalyptic number.

It is an amenable number.

49617409 is a deficient number, since it is larger than the sum of its proper divisors (1).

49617409 is an equidigital number, since it uses as much as digits as its factorization.

49617409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 49617409 is about 7043.9625921778. The cubic root of 49617409 is about 367.4610914119.

The spelling of 49617409 in words is "forty-nine million, six hundred seventeen thousand, four hundred nine".