49998181 has 2 divisors, whose sum is σ = 49998182. Its totient is φ = 49998180.

The previous prime is 49998167. The next prime is 49998197. The reversal of 49998181 is 18189994.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49575681 + 422500 = 7041^2 + 650^2 .

It is a cyclic number.

It is not a de Polignac number, because 49998181 - 2¹⁵ = 49965413 is a prime.

It is a super-2 number, since 2×49998181² = 4999636206617522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49938181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24999090 + 24999091.

It is an arithmetic number, because the mean of its divisors is an integer number (24999091).

Almost surely, 2^49998181 is an apocalyptic number.

It is an amenable number.

49998181 is a deficient number, since it is larger than the sum of its proper divisors (1).

49998181 is an equidigital number, since it uses as much as digits as its factorization.

49998181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 49.

The square root of 49998181 is about 7070.9391879721. The cubic root of 49998181 is about 368.3986823077.

The spelling of 49998181 in words is "forty-nine million, nine hundred ninety-eight thousand, one hundred eighty-one".