49939999 has 8 divisors (see below), whose sum is σ = 55661040. Its totient is φ = 44528256.

The previous prime is 49939987. The next prime is 49940017. The reversal of 49939999 is 99993994.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 49939999 - 2⁷ = 49939871 is a prime.

It is a Duffinian number.

49939999 is a modest number, since divided by 9999 gives 4993 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49939949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76984 + ... + 77629.

It is an arithmetic number, because the mean of its divisors is an integer number (6957630).

Almost surely, 2^49939999 is an apocalyptic number.

49939999 is a deficient number, since it is larger than the sum of its proper divisors (5721041).

49939999 is a wasteful number, since it uses less digits than its factorization.

49939999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154649.

The product of its digits is 6377292, while the sum is 61.

The square root of 49939999 is about 7066.8238268688. The cubic root of 49939999 is about 368.2557271623.

The spelling of 49939999 in words is "forty-nine million, nine hundred thirty-nine thousand, nine hundred ninety-nine".