49689999 has 6 divisors (see below), whose sum is σ = 71774456. Its totient is φ = 33126660.

The previous prime is 49689979. The next prime is 49690009. The reversal of 49689999 is 99998694.

It is not a de Polignac number, because 49689999 - 2⁵ = 49689967 is a prime.

It is a Duffinian number.

49689999 is a modest number, since divided by 9999 gives 4968 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49689979) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2760547 + ... + 2760564.

Almost surely, 2^49689999 is an apocalyptic number.

49689999 is a deficient number, since it is larger than the sum of its proper divisors (22084457).

49689999 is a wasteful number, since it uses less digits than its factorization.

49689999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5521117 (or 5521114 counting only the distinct ones).

The product of its digits is 11337408, while the sum is 63.

The square root of 49689999 is about 7049.1133484999. The cubic root of 49689999 is about 367.6402019550.

The spelling of 49689999 in words is "forty-nine million, six hundred eighty-nine thousand, nine hundred ninety-nine".