49247509 has 2 divisors, whose sum is σ = 49247510. Its totient is φ = 49247508.

The previous prime is 49247507. The next prime is 49247533. The reversal of 49247509 is 90574294.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48692484 + 555025 = 6978^2 + 745^2 .

It is a cyclic number.

It is not a de Polignac number, because 49247509 - 2¹ = 49247507 is a prime.

Together with 49247507, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49247507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24623754 + 24623755.

It is an arithmetic number, because the mean of its divisors is an integer number (24623755).

Almost surely, 2^49247509 is an apocalyptic number.

It is an amenable number.

49247509 is a deficient number, since it is larger than the sum of its proper divisors (1).

49247509 is an equidigital number, since it uses as much as digits as its factorization.

49247509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 49247509 is about 7017.6569451634. The cubic root of 49247509 is about 366.5456665022.

The spelling of 49247509 in words is "forty-nine million, two hundred forty-seven thousand, five hundred nine".