49509619 has 2 divisors, whose sum is σ = 49509620. Its totient is φ = 49509618.

The previous prime is 49509617. The next prime is 49509623. The reversal of 49509619 is 91690594.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 49509619 - 2¹ = 49509617 is a prime.

It is a super-2 number, since 2×49509619² = 4902404747050322, which contains 22 as substring.

Together with 49509617, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (49509617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24754809 + 24754810.

It is an arithmetic number, because the mean of its divisors is an integer number (24754810).

Almost surely, 2^49509619 is an apocalyptic number.

49509619 is a deficient number, since it is larger than the sum of its proper divisors (1).

49509619 is an equidigital number, since it uses as much as digits as its factorization.

49509619 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 49509619 is about 7036.3071990924. The cubic root of 49509619 is about 367.1948048488.

The spelling of 49509619 in words is "forty-nine million, five hundred nine thousand, six hundred nineteen".