50807917 has 4 divisors (see below), whose sum is σ = 53796636. Its totient is φ = 47819200.

The previous prime is 50807873. The next prime is 50807923. The reversal of 50807917 is 71970805.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71970805 = 5 ⋅14394161.

It can be written as a sum of positive squares in 2 ways, for example, as 31147561 + 19660356 = 5581^2 + 4434^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50807917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50807947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1494334 + ... + 1494367.

It is an arithmetic number, because the mean of its divisors is an integer number (13449159).

Almost surely, 2^50807917 is an apocalyptic number.

It is an amenable number.

50807917 is a deficient number, since it is larger than the sum of its proper divisors (2988719).

50807917 is a wasteful number, since it uses less digits than its factorization.

50807917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2988718.

The product of its (nonzero) digits is 17640, while the sum is 37.

The square root of 50807917 is about 7127.9672417878. The cubic root of 50807917 is about 370.3768184447.

The spelling of 50807917 in words is "fifty million, eight hundred seven thousand, nine hundred seventeen".