50969813 has 4 divisors (see below), whose sum is σ = 51181548. Its totient is φ = 50758080.

The previous prime is 50969803. The next prime is 50969819. The reversal of 50969813 is 31896905.

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 37478884 + 13490929 = 6122^2 + 3673^2 .

It is a cyclic number.

It is not a de Polignac number, because 50969813 - 2¹⁶ = 50904277 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 (50969819) 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, 105506 + ... + 105987.

It is an arithmetic number, because the mean of its divisors is an integer number (12795387).

Almost surely, 2^50969813 is an apocalyptic number.

It is an amenable number.

50969813 is a deficient number, since it is larger than the sum of its proper divisors (211735).

50969813 is a wasteful number, since it uses less digits than its factorization.

50969813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211734.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 50969813 is about 7139.3146029573. The cubic root of 50969813 is about 370.7697949241.

The spelling of 50969813 in words is "fifty million, nine hundred sixty-nine thousand, eight hundred thirteen".