50143989 has 16 divisors (see below), whose sum is σ = 77853312. Its totient is φ = 28112448.

The previous prime is 50143981. The next prime is 50143993. The reversal of 50143989 is 98934105.

It is not a de Polignac number, because 50143989 - 2³ = 50143981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50143981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21414 + ... + 23639.

It is an arithmetic number, because the mean of its divisors is an integer number (4865832).

Almost surely, 2^50143989 is an apocalyptic number.

It is an amenable number.

50143989 is a deficient number, since it is larger than the sum of its proper divisors (27709323).

50143989 is a wasteful number, since it uses less digits than its factorization.

50143989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45116.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 50143989 is about 7081.2420520697. The cubic root of 50143989 is about 368.7564509453.

The spelling of 50143989 in words is "fifty million, one hundred forty-three thousand, nine hundred eighty-nine".