49899999 has 4 divisors (see below), whose sum is σ = 66533336. Its totient is φ = 33266664.

The previous prime is 49899991. The next prime is 49900003. The reversal of 49899999 is 99999894.

It is a happy number.

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

It is not a de Polignac number, because 49899999 - 2³ = 49899991 is a prime.

It is a Duffinian number.

49899999 is a modest number, since divided by 9999 gives 4989 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49899991) 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, 8316664 + ... + 8316669.

It is an arithmetic number, because the mean of its divisors is an integer number (16633334).

Almost surely, 2^49899999 is an apocalyptic number.

49899999 is a deficient number, since it is larger than the sum of its proper divisors (16633337).

49899999 is a wasteful number, since it uses less digits than its factorization.

49899999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16633336.

The product of its digits is 17006112, while the sum is 66.

The square root of 49899999 is about 7063.9931341982. The cubic root of 49899999 is about 368.1573813879.

The spelling of 49899999 in words is "forty-nine million, eight hundred ninety-nine thousand, nine hundred ninety-nine".