50990785 has 4 divisors (see below), whose sum is σ = 61188948. Its totient is φ = 40792624.

The previous prime is 50990767. The next prime is 50990789. The reversal of 50990785 is 58709905.

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 10439361 + 40551424 = 3231^2 + 6368^2 .

It is a cyclic number.

It is not a de Polignac number, because 50990785 - 2⁹ = 50990273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50990789) 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, 5099074 + ... + 5099083.

It is an arithmetic number, because the mean of its divisors is an integer number (15297237).

Almost surely, 2^50990785 is an apocalyptic number.

It is an amenable number.

50990785 is a deficient number, since it is larger than the sum of its proper divisors (10198163).

50990785 is a wasteful number, since it uses less digits than its factorization.

50990785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10198162.

The product of its (nonzero) digits is 113400, while the sum is 43.

The square root of 50990785 is about 7140.7832203478. The cubic root of 50990785 is about 370.8206401693.

The spelling of 50990785 in words is "fifty million, nine hundred ninety thousand, seven hundred eighty-five".