49439999 has 8 divisors (see below), whose sum is σ = 56567808. Its totient is φ = 42328440.

The previous prime is 49439993. The next prime is 49440007. The reversal of 49439999 is 99993494.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-49439999 is a prime.

It is a super-2 number, since 2×49439999² = 4888627002240002, which contains 22 as substring.

It is a Duffinian number.

49439999 is a modest number, since divided by 9999 gives 4943 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49439993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3374 + ... + 10500.

It is an arithmetic number, because the mean of its divisors is an integer number (7070976).

Almost surely, 2^49439999 is an apocalyptic number.

49439999 is a deficient number, since it is larger than the sum of its proper divisors (7127809).

49439999 is an equidigital number, since it uses as much as digits as its factorization.

49439999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8125.

The product of its digits is 2834352, while the sum is 56.

The square root of 49439999 is about 7031.3582613888. The cubic root of 49439999 is about 367.0226087189.

The spelling of 49439999 in words is "forty-nine million, four hundred thirty-nine thousand, nine hundred ninety-nine".