149415187 has 4 divisors (see below), whose sum is σ = 149484160. Its totient is φ = 149346216.

The previous prime is 149415179. The next prime is 149415191. The reversal of 149415187 is 781514941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 781514941 = 229 ⋅3412729.

It is a cyclic number.

It is not a de Polignac number, because 149415187 - 2³ = 149415179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149415137) 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, 31128 + ... + 35605.

It is an arithmetic number, because the mean of its divisors is an integer number (37371040).

Almost surely, 2^149415187 is an apocalyptic number.

149415187 is a deficient number, since it is larger than the sum of its proper divisors (68973).

149415187 is an equidigital number, since it uses as much as digits as its factorization.

149415187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68972.

The product of its digits is 40320, while the sum is 40.

The square root of 149415187 is about 12223.5505071154. The cubic root of 149415187 is about 530.6378779969.

The spelling of 149415187 in words is "one hundred forty-nine million, four hundred fifteen thousand, one hundred eighty-seven".