50172091 has 2 divisors, whose sum is σ = 50172092. Its totient is φ = 50172090.

The previous prime is 50172047. The next prime is 50172107. The reversal of 50172091 is 19027105.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 50172091 - 2²⁵ = 16617659 is a prime.

It is not a weakly prime, because it can be changed into another prime (50172011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25086045 + 25086046.

It is an arithmetic number, because the mean of its divisors is an integer number (25086046).

Almost surely, 2^50172091 is an apocalyptic number.

50172091 is a deficient number, since it is larger than the sum of its proper divisors (1).

50172091 is an equidigital number, since it uses as much as digits as its factorization.

50172091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 50172091 is about 7083.2260305598. The cubic root of 50172091 is about 368.8253249933.

Adding to 50172091 its reverse (19027105), we get a palindrome (69199196).

The spelling of 50172091 in words is "fifty million, one hundred seventy-two thousand, ninety-one".