49999181 has 4 divisors (see below), whose sum is σ = 50023452. Its totient is φ = 49974912.

The previous prime is 49999177. The next prime is 49999207. The reversal of 49999181 is 18199994.

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

It can be written as a sum of positive squares in 2 ways, for example, as 39175081 + 10824100 = 6259^2 + 3290^2 .

It is a cyclic number.

It is not a de Polignac number, because 49999181 - 2² = 49999177 is a prime.

It is a super-2 number, since 2×49999181² = 4999836201341522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49999111) 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 3 ways as a sum of consecutive naturals, for example, 8726 + ... + 13271.

It is an arithmetic number, because the mean of its divisors is an integer number (12505863).

Almost surely, 2^49999181 is an apocalyptic number.

It is an amenable number.

49999181 is a deficient number, since it is larger than the sum of its proper divisors (24271).

49999181 is a wasteful number, since it uses less digits than its factorization.

49999181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24270.

The product of its digits is 209952, while the sum is 50.

The square root of 49999181 is about 7071.0098995829. The cubic root of 49999181 is about 368.4011383719.

The spelling of 49999181 in words is "forty-nine million, nine hundred ninety-nine thousand, one hundred eighty-one".