149932171 has 2 divisors, whose sum is σ = 149932172. Its totient is φ = 149932170.

The previous prime is 149932087. The next prime is 149932183. The reversal of 149932171 is 171239941.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 149932171 - 2²¹ = 147835019 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 149932171.

It is not a weakly prime, because it can be changed into another prime (149332171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74966085 + 74966086.

It is an arithmetic number, because the mean of its divisors is an integer number (74966086).

Almost surely, 2^149932171 is an apocalyptic number.

149932171 is a deficient number, since it is larger than the sum of its proper divisors (1).

149932171 is an equidigital number, since it uses as much as digits as its factorization.

149932171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 37.

The square root of 149932171 is about 12244.6792934727. The cubic root of 149932171 is about 531.2491846631.

It can be divided in two parts, 1499 and 32171, that added together give a triangular number (33670 = T₂₅₉).

The spelling of 149932171 in words is "one hundred forty-nine million, nine hundred thirty-two thousand, one hundred seventy-one".