50009909 has 2 divisors, whose sum is σ = 50009910. Its totient is φ = 50009908.

The previous prime is 50009879. The next prime is 50009929. The reversal of 50009909 is 90990005.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29669809 + 20340100 = 5447^2 + 4510^2 .

It is a cyclic number.

It is not a de Polignac number, because 50009909 - 2¹⁶ = 49944373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50009929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25004954 + 25004955.

It is an arithmetic number, because the mean of its divisors is an integer number (25004955).

Almost surely, 2^50009909 is an apocalyptic number.

It is an amenable number.

50009909 is a deficient number, since it is larger than the sum of its proper divisors (1).

50009909 is an equidigital number, since it uses as much as digits as its factorization.

50009909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3645, while the sum is 32.

The square root of 50009909 is about 7071.7684492636. The cubic root of 50009909 is about 368.4274849686.

The spelling of 50009909 in words is "fifty million, nine thousand, nine hundred nine".