49199989 has 8 divisors (see below), whose sum is σ = 52398360. Its totient is φ = 46035456.

The previous prime is 49199981. The next prime is 49200017. The reversal of 49199989 is 98999194.

It can be written as a sum of positive squares in 4 ways, for example, as 28196100 + 21003889 = 5310^2 + 4583^2 .

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

It is not a de Polignac number, because 49199989 - 2³ = 49199981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49199981) 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, 5424 + ... + 11305.

It is an arithmetic number, because the mean of its divisors is an integer number (6549795).

Almost surely, 2^49199989 is an apocalyptic number.

It is an amenable number.

49199989 is a deficient number, since it is larger than the sum of its proper divisors (3198371).

49199989 is a wasteful number, since it uses less digits than its factorization.

49199989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16919.

The product of its digits is 1889568, while the sum is 58.

The square root of 49199989 is about 7014.2703825843. The cubic root of 49199989 is about 366.4277325813.

The spelling of 49199989 in words is "forty-nine million, one hundred ninety-nine thousand, nine hundred eighty-nine".