50159999 has 4 divisors (see below), whose sum is σ = 50180064. Its totient is φ = 50139936.

The previous prime is 50159959. The next prime is 50160017. The reversal of 50159999 is 99995105.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 50159999 - 2⁸ = 50159743 is a prime.

It is a Duffinian number.

50159999 is a modest number, since divided by 9999 gives 5015 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50159929) 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, 5642 + ... + 11495.

It is an arithmetic number, because the mean of its divisors is an integer number (12545016).

Almost surely, 2^50159999 is an apocalyptic number.

50159999 is a deficient number, since it is larger than the sum of its proper divisors (20065).

50159999 is a wasteful number, since it uses less digits than its factorization.

50159999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20064.

The product of its (nonzero) digits is 164025, while the sum is 47.

The square root of 50159999 is about 7082.3724132525. The cubic root of 50159999 is about 368.7956923558.

The spelling of 50159999 in words is "fifty million, one hundred fifty-nine thousand, nine hundred ninety-nine".