149668129 has 4 divisors (see below), whose sum is σ = 161181076. Its totient is φ = 138155184.

The previous prime is 149668109. The next prime is 149668133. The reversal of 149668129 is 921866941.

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: 921866941 = 15649 ⋅58909.

It can be written as a sum of positive squares in 2 ways, for example, as 102718225 + 46949904 = 10135^2 + 6852^2 .

It is a cyclic number.

It is not a de Polignac number, because 149668129 - 2⁵ = 149668097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149668109) 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, 5756454 + ... + 5756479.

It is an arithmetic number, because the mean of its divisors is an integer number (40295269).

Almost surely, 2^149668129 is an apocalyptic number.

It is an amenable number.

149668129 is a deficient number, since it is larger than the sum of its proper divisors (11512947).

149668129 is a wasteful number, since it uses less digits than its factorization.

149668129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11512946.

The product of its digits is 186624, while the sum is 46.

The square root of 149668129 is about 12233.8926348076. The cubic root of 149668129 is about 530.9371446248.

The spelling of 149668129 in words is "one hundred forty-nine million, six hundred sixty-eight thousand, one hundred twenty-nine".