50138989 has 8 divisors (see below), whose sum is σ = 52398720. Its totient is φ = 47929056.

The previous prime is 50138969. The next prime is 50139029. The reversal of 50138989 is 98983105.

50138989 = 306² + 307² + ... + 563².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 50138989 - 2⁷ = 50138861 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50138909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10384 + ... + 14425.

It is an arithmetic number, because the mean of its divisors is an integer number (6549840).

Almost surely, 2^50138989 is an apocalyptic number.

It is an amenable number.

50138989 is a deficient number, since it is larger than the sum of its proper divisors (2259731).

50138989 is a wasteful number, since it uses less digits than its factorization.

50138989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24899.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 50138989 is about 7080.8889978590. Note that the first 3 decimals coincide. The cubic root of 50138989 is about 368.7441939524.

The spelling of 50138989 in words is "fifty million, one hundred thirty-eight thousand, nine hundred eighty-nine".