49457509 has 2 divisors, whose sum is σ = 49457510. Its totient is φ = 49457508.

The previous prime is 49457497. The next prime is 49457531. The reversal of 49457509 is 90575494.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31606884 + 17850625 = 5622^2 + 4225^2 .

It is a cyclic number.

It is not a de Polignac number, because 49457509 - 2¹⁷ = 49326437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49457549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24728754 + 24728755.

It is an arithmetic number, because the mean of its divisors is an integer number (24728755).

Almost surely, 2^49457509 is an apocalyptic number.

It is an amenable number.

49457509 is a deficient number, since it is larger than the sum of its proper divisors (1).

49457509 is an equidigital number, since it uses as much as digits as its factorization.

49457509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226800, while the sum is 43.

The square root of 49457509 is about 7032.6032875458. The cubic root of 49457509 is about 367.0659326635.

The spelling of 49457509 in words is "forty-nine million, four hundred fifty-seven thousand, five hundred nine".