50291989 has 4 divisors (see below), whose sum is σ = 54864000. Its totient is φ = 45719980.

The previous prime is 50291987. The next prime is 50292017. The reversal of 50291989 is 98919205.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 50291989 - 2¹ = 50291987 is a prime.

It is a super-2 number, since 2×50291989² = 5058568315152242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50291981) 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, 2285989 + ... + 2286010.

It is an arithmetic number, because the mean of its divisors is an integer number (13716000).

Almost surely, 2^50291989 is an apocalyptic number.

It is an amenable number.

50291989 is a deficient number, since it is larger than the sum of its proper divisors (4572011).

50291989 is a wasteful number, since it uses less digits than its factorization.

50291989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4572010.

The product of its (nonzero) digits is 58320, while the sum is 43.

The square root of 50291989 is about 7091.6844966482. The cubic root of 50291989 is about 369.1188895283.

The spelling of 50291989 in words is "fifty million, two hundred ninety-one thousand, nine hundred eighty-nine".