149371181 has 2 divisors, whose sum is σ = 149371182. Its totient is φ = 149371180.

The previous prime is 149371171. The next prime is 149371253. The reversal of 149371181 is 181173941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131308681 + 18062500 = 11459^2 + 4250^2 .

It is a cyclic number.

It is not a de Polignac number, because 149371181 - 2¹⁰ = 149370157 is a prime.

It is a super-2 number, since 2×149371181² = 44623499426669522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149371171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74685590 + 74685591.

It is an arithmetic number, because the mean of its divisors is an integer number (74685591).

Almost surely, 2^149371181 is an apocalyptic number.

It is an amenable number.

149371181 is a deficient number, since it is larger than the sum of its proper divisors (1).

149371181 is an equidigital number, since it uses as much as digits as its factorization.

149371181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 35.

The square root of 149371181 is about 12221.7503247285. The cubic root of 149371181 is about 530.5857781094.

The spelling of 149371181 in words is "one hundred forty-nine million, three hundred seventy-one thousand, one hundred eighty-one".