49619509 has 2 divisors, whose sum is σ = 49619510. Its totient is φ = 49619508.

The previous prime is 49619503. The next prime is 49619513. The reversal of 49619509 is 90591694.

49619509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27857284 + 21762225 = 5278^2 + 4665^2 .

It is a cyclic number.

It is not a de Polignac number, because 49619509 - 2⁹ = 49618997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49619503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24809754 + 24809755.

It is an arithmetic number, because the mean of its divisors is an integer number (24809755).

Almost surely, 2^49619509 is an apocalyptic number.

It is an amenable number.

49619509 is a deficient number, since it is larger than the sum of its proper divisors (1).

49619509 is an equidigital number, since it uses as much as digits as its factorization.

49619509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 49619509 is about 7044.1116544246. Note that the first 3 decimals coincide. The cubic root of 49619509 is about 367.4662754621.

The spelling of 49619509 in words is "forty-nine million, six hundred nineteen thousand, five hundred nine".