50998999 has 4 divisors (see below), whose sum is σ = 52644160. Its totient is φ = 49353840.

The previous prime is 50998991. The next prime is 50999033. The reversal of 50998999 is 99989905.

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 50998999 - 2³ = 50998991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50998991) 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, 822534 + ... + 822595.

It is an arithmetic number, because the mean of its divisors is an integer number (13161040).

Almost surely, 2^50998999 is an apocalyptic number.

50998999 is a deficient number, since it is larger than the sum of its proper divisors (1645161).

50998999 is a wasteful number, since it uses less digits than its factorization.

50998999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1645160.

The product of its (nonzero) digits is 2361960, while the sum is 58.

The square root of 50998999 is about 7141.3583441807. The cubic root of 50998999 is about 370.8405506766.

The spelling of 50998999 in words is "fifty million, nine hundred ninety-eight thousand, nine hundred ninety-nine".