49915309 has 2 divisors, whose sum is σ = 49915310. Its totient is φ = 49915308.

The previous prime is 49915297. The next prime is 49915319. The reversal of 49915309 is 90351994.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43428100 + 6487209 = 6590^2 + 2547^2 .

It is a cyclic number.

It is not a de Polignac number, because 49915309 - 2⁷ = 49915181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49915319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24957654 + 24957655.

It is an arithmetic number, because the mean of its divisors is an integer number (24957655).

Almost surely, 2^49915309 is an apocalyptic number.

It is an amenable number.

49915309 is a deficient number, since it is larger than the sum of its proper divisors (1).

49915309 is an equidigital number, since it uses as much as digits as its factorization.

49915309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 49915309 is about 7065.0767157901. The cubic root of 49915309 is about 368.1950294392.

The spelling of 49915309 in words is "forty-nine million, nine hundred fifteen thousand, three hundred nine".