181950149 has 2 divisors, whose sum is σ = 181950150. Its totient is φ = 181950148.

The previous prime is 181950143. The next prime is 181950163. The reversal of 181950149 is 941059181.

181950149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141181924 + 40768225 = 11882^2 + 6385^2 .

It is a cyclic number.

It is not a de Polignac number, because 181950149 - 2⁸ = 181949893 is a prime.

It is a super-2 number, since 2×181950149² = 66211713442244402, 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 (181950143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90975074 + 90975075.

It is an arithmetic number, because the mean of its divisors is an integer number (90975075).

Almost surely, 2^181950149 is an apocalyptic number.

It is an amenable number.

181950149 is a deficient number, since it is larger than the sum of its proper divisors (1).

181950149 is an equidigital number, since it uses as much as digits as its factorization.

181950149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 38.

The square root of 181950149 is about 13488.8898357129. The cubic root of 181950149 is about 566.6533646628.

The spelling of 181950149 in words is "one hundred eighty-one million, nine hundred fifty thousand, one hundred forty-nine".