49909309 has 2 divisors, whose sum is σ = 49909310. Its totient is φ = 49909308.

The previous prime is 49909303. The next prime is 49909381. The reversal of 49909309 is 90390994.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43164900 + 6744409 = 6570^2 + 2597^2 .

It is a cyclic number.

It is not a de Polignac number, because 49909309 - 2¹⁷ = 49778237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49909303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24954654 + 24954655.

It is an arithmetic number, because the mean of its divisors is an integer number (24954655).

Almost surely, 2^49909309 is an apocalyptic number.

It is an amenable number.

49909309 is a deficient number, since it is larger than the sum of its proper divisors (1).

49909309 is an equidigital number, since it uses as much as digits as its factorization.

49909309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78732, while the sum is 43.

The square root of 49909309 is about 7064.6520791897. The cubic root of 49909309 is about 368.1802760583.

The spelling of 49909309 in words is "forty-nine million, nine hundred nine thousand, three hundred nine".