50119991 has 2 divisors, whose sum is σ = 50119992. Its totient is φ = 50119990.

The previous prime is 50119981. The next prime is 50120009. The reversal of 50119991 is 19991105.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50119991 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50119981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25059995 + 25059996.

It is an arithmetic number, because the mean of its divisors is an integer number (25059996).

Almost surely, 2^50119991 is an apocalyptic number.

50119991 is a deficient number, since it is larger than the sum of its proper divisors (1).

50119991 is an equidigital number, since it uses as much as digits as its factorization.

50119991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3645, while the sum is 35.

The square root of 50119991 is about 7079.5473725373. The cubic root of 50119991 is about 368.6976148509.

The spelling of 50119991 in words is "fifty million, one hundred nineteen thousand, nine hundred ninety-one".