50001309 has 6 divisors (see below), whose sum is σ = 72224126. Its totient is φ = 33334200.

The previous prime is 50001299. The next prime is 50001353. The reversal of 50001309 is 90310005.

It can be written as a sum of positive squares in only one way, i.e., 44595684 + 5405625 = 6678^2 + 2325^2 .

It is not a de Polignac number, because 50001309 - 2⁸ = 50001053 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 50001291 and 50001300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50001359) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2777842 + ... + 2777859.

Almost surely, 2^50001309 is an apocalyptic number.

It is an amenable number.

50001309 is a deficient number, since it is larger than the sum of its proper divisors (22222817).

50001309 is a wasteful number, since it uses less digits than its factorization.

50001309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5555707 (or 5555704 counting only the distinct ones).

The product of its (nonzero) digits is 135, while the sum is 18.

The square root of 50001309 is about 7071.1603715373. The cubic root of 50001309 is about 368.4063647675.

The spelling of 50001309 in words is "fifty million, one thousand, three hundred nine".