50396781 has 4 divisors (see below), whose sum is σ = 67195712. Its totient is φ = 33597852.

The previous prime is 50396777. The next prime is 50396783. The reversal of 50396781 is 18769305.

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.

It is not a de Polignac number, because 50396781 - 2² = 50396777 is a prime.

It is a super-2 number, since 2×50396781² = 5079671070323922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50396783) 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, 8399461 + ... + 8399466.

It is an arithmetic number, because the mean of its divisors is an integer number (16798928).

Almost surely, 2^50396781 is an apocalyptic number.

It is an amenable number.

50396781 is a deficient number, since it is larger than the sum of its proper divisors (16798931).

50396781 is a wasteful number, since it uses less digits than its factorization.

50396781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16798930.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 50396781 is about 7099.0690234706. The cubic root of 50396781 is about 369.3750858764.

The spelling of 50396781 in words is "fifty million, three hundred ninety-six thousand, seven hundred eighty-one".