50890813 has 4 divisors (see below), whose sum is σ = 51149340. Its totient is φ = 50632288.

The previous prime is 50890811. The next prime is 50890837. The reversal of 50890813 is 31809805.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44063044 + 6827769 = 6638^2 + 2613^2 .

It is a cyclic number.

It is not a de Polignac number, because 50890813 - 2¹ = 50890811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50890811) 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, 128968 + ... + 129361.

It is an arithmetic number, because the mean of its divisors is an integer number (12787335).

Almost surely, 2^50890813 is an apocalyptic number.

It is an amenable number.

50890813 is a deficient number, since it is larger than the sum of its proper divisors (258527).

50890813 is a wasteful number, since it uses less digits than its factorization.

50890813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258526.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 50890813 is about 7133.7797134478. The cubic root of 50890813 is about 370.5781392618.

The spelling of 50890813 in words is "fifty million, eight hundred ninety thousand, eight hundred thirteen".