149309187 has 4 divisors (see below), whose sum is σ = 199078920. Its totient is φ = 99539456.

The previous prime is 149309161. The next prime is 149309203. The reversal of 149309187 is 781903941.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 149309187 - 2⁷ = 149309059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (149309387) 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, 24884862 + ... + 24884867.

It is an arithmetic number, because the mean of its divisors is an integer number (49769730).

Almost surely, 2^149309187 is an apocalyptic number.

149309187 is a deficient number, since it is larger than the sum of its proper divisors (49769733).

149309187 is an equidigital number, since it uses as much as digits as its factorization.

149309187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49769732.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 149309187 is about 12219.2138454158. The cubic root of 149309187 is about 530.5123643800.

The spelling of 149309187 in words is "one hundred forty-nine million, three hundred nine thousand, one hundred eighty-seven".