49647809 has 2 divisors, whose sum is σ = 49647810. Its totient is φ = 49647808.

The previous prime is 49647799. The next prime is 49647853. The reversal of 49647809 is 90874694.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49392784 + 255025 = 7028^2 + 505^2 .

It is a cyclic number.

It is not a de Polignac number, because 49647809 - 2⁸ = 49647553 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (49647889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24823904 + 24823905.

It is an arithmetic number, because the mean of its divisors is an integer number (24823905).

Almost surely, 2^49647809 is an apocalyptic number.

It is an amenable number.

49647809 is a deficient number, since it is larger than the sum of its proper divisors (1).

49647809 is an equidigital number, since it uses as much as digits as its factorization.

49647809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 49647809 is about 7046.1201380618. The cubic root of 49647809 is about 367.5361224462.

The spelling of 49647809 in words is "forty-nine million, six hundred forty-seven thousand, eight hundred nine".