149715169 has 4 divisors (see below), whose sum is σ = 151040196. Its totient is φ = 148390144.

The previous prime is 149715157. The next prime is 149715187. The reversal of 149715169 is 961517941.

It is a happy number.

149715169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 961517941 = 241 ⋅3989701.

It can be written as a sum of positive squares in 2 ways, for example, as 9529569 + 140185600 = 3087^2 + 11840^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149715169 is a prime.

It is a super-2 number, since 2×149715169² = 44829263657397122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149715569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 662344 + ... + 662569.

It is an arithmetic number, because the mean of its divisors is an integer number (37760049).

Almost surely, 2^149715169 is an apocalyptic number.

It is an amenable number.

149715169 is a deficient number, since it is larger than the sum of its proper divisors (1325027).

149715169 is a wasteful number, since it uses less digits than its factorization.

149715169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325026.

The product of its digits is 68040, while the sum is 43.

The square root of 149715169 is about 12235.8150116778. The cubic root of 149715169 is about 530.9927624938.

The spelling of 149715169 in words is "one hundred forty-nine million, seven hundred fifteen thousand, one hundred sixty-nine".