50920913 has 4 divisors (see below), whose sum is σ = 50961648. Its totient is φ = 50880180.

The previous prime is 50920907. The next prime is 50920921. The reversal of 50920913 is 31902905.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31902905 = 5 ⋅6380581.

It is a cyclic number.

It is not a de Polignac number, because 50920913 - 2¹⁰ = 50919889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50920943) 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, 18431 + ... + 21012.

It is an arithmetic number, because the mean of its divisors is an integer number (12740412).

Almost surely, 2^50920913 is an apocalyptic number.

It is an amenable number.

50920913 is a deficient number, since it is larger than the sum of its proper divisors (40735).

50920913 is a wasteful number, since it uses less digits than its factorization.

50920913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40734.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 50920913 is about 7135.8890826582. The cubic root of 50920913 is about 370.6511858683.

The spelling of 50920913 in words is "fifty million, nine hundred twenty thousand, nine hundred thirteen".