49799999 has 4 divisors (see below), whose sum is σ = 50006880. Its totient is φ = 49593120.

The previous prime is 49799993. The next prime is 49800001. The reversal of 49799999 is 99999794.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99999794 = 2 ⋅49999897.

It is a cyclic number.

It is not a de Polignac number, because 49799999 - 2²⁴ = 33022783 is a prime.

It is a Duffinian number.

49799999 is a modest number, since divided by 9999 gives 4979 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49799993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103079 + ... + 103560.

It is an arithmetic number, because the mean of its divisors is an integer number (12501720).

Almost surely, 2^49799999 is an apocalyptic number.

49799999 is a deficient number, since it is larger than the sum of its proper divisors (206881).

49799999 is a wasteful number, since it uses less digits than its factorization.

49799999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206880.

The product of its digits is 14880348, while the sum is 65.

The square root of 49799999 is about 7056.9114348984. The cubic root of 49799999 is about 367.9112868034.

The spelling of 49799999 in words is "forty-nine million, seven hundred ninety-nine thousand, nine hundred ninety-nine".