50781109 has 4 divisors (see below), whose sum is σ = 51539104. Its totient is φ = 50023116.

The previous prime is 50781061. The next prime is 50781119. The reversal of 50781109 is 90118705.

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 a cyclic number.

It is not a de Polignac number, because 50781109 - 2²³ = 42392501 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 (50781119) 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, 378897 + ... + 379030.

It is an arithmetic number, because the mean of its divisors is an integer number (12884776).

Almost surely, 2^50781109 is an apocalyptic number.

It is an amenable number.

50781109 is a deficient number, since it is larger than the sum of its proper divisors (757995).

50781109 is an equidigital number, since it uses as much as digits as its factorization.

50781109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757994.

The product of its (nonzero) digits is 2520, while the sum is 31.

The square root of 50781109 is about 7126.0865136483. The cubic root of 50781109 is about 370.3116658126.

The spelling of 50781109 in words is "fifty million, seven hundred eighty-one thousand, one hundred nine".