149968129 has 4 divisors (see below), whose sum is σ = 150006340. Its totient is φ = 149929920.

The previous prime is 149968109. The next prime is 149968151. The reversal of 149968129 is 921869941.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 921869941 = 10133 ⋅90977.

It can be written as a sum of positive squares in 2 ways, for example, as 94614529 + 55353600 = 9727^2 + 7440^2 .

It is a cyclic number.

It is not a de Polignac number, because 149968129 - 2⁷ = 149968001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149968109) 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, 12444 + ... + 21325.

It is an arithmetic number, because the mean of its divisors is an integer number (37501585).

Almost surely, 2^149968129 is an apocalyptic number.

It is an amenable number.

149968129 is a deficient number, since it is larger than the sum of its proper divisors (38211).

149968129 is an equidigital number, since it uses as much as digits as its factorization.

149968129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38210.

The product of its digits is 279936, while the sum is 49.

The square root of 149968129 is about 12246.1475166683. The cubic root of 149968129 is about 531.2916508244.

The spelling of 149968129 in words is "one hundred forty-nine million, nine hundred sixty-eight thousand, one hundred twenty-nine".