49990859 has 4 divisors (see below), whose sum is σ = 50485920. Its totient is φ = 49495800.

The previous prime is 49990847. The next prime is 49990873. The reversal of 49990859 is 95809994.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49990859 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 49990859.

It is not an unprimeable number, because it can be changed into a prime (49990559) 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, 247379 + ... + 247580.

It is an arithmetic number, because the mean of its divisors is an integer number (12621480).

Almost surely, 2^49990859 is an apocalyptic number.

49990859 is a deficient number, since it is larger than the sum of its proper divisors (495061).

49990859 is a wasteful number, since it uses less digits than its factorization.

49990859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495060.

The product of its (nonzero) digits is 1049760, while the sum is 53.

The square root of 49990859 is about 7070.4214160119. The cubic root of 49990859 is about 368.3806980078.

The spelling of 49990859 in words is "forty-nine million, nine hundred ninety thousand, eight hundred fifty-nine".