50402309 has 2 divisors, whose sum is σ = 50402310. Its totient is φ = 50402308.

The previous prime is 50402299. The next prime is 50402347. The reversal of 50402309 is 90320405.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43230625 + 7171684 = 6575^2 + 2678^2 .

It is a cyclic number.

It is not a de Polignac number, because 50402309 - 2⁴ = 50402293 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50402509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25201154 + 25201155.

It is an arithmetic number, because the mean of its divisors is an integer number (25201155).

Almost surely, 2^50402309 is an apocalyptic number.

It is an amenable number.

50402309 is a deficient number, since it is larger than the sum of its proper divisors (1).

50402309 is an equidigital number, since it uses as much as digits as its factorization.

50402309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 50402309 is about 7099.4583596215. The cubic root of 50402309 is about 369.3885909110.

The spelling of 50402309 in words is "fifty million, four hundred two thousand, three hundred nine".