149198185 has 8 divisors (see below), whose sum is σ = 185211720. Its totient is φ = 115242624.

The previous prime is 149198183. The next prime is 149198209. The reversal of 149198185 is 581891941.

It can be written as a sum of positive squares in 4 ways, for example, as 7778521 + 141419664 = 2789^2 + 11892^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 149198185 - 2¹ = 149198183 is a prime.

It is not an unprimeable number, because it can be changed into a prime (149198183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 514332 + ... + 514621.

It is an arithmetic number, because the mean of its divisors is an integer number (23151465).

Almost surely, 2^149198185 is an apocalyptic number.

It is an amenable number.

149198185 is a deficient number, since it is larger than the sum of its proper divisors (36013535).

149198185 is a wasteful number, since it uses less digits than its factorization.

149198185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028987.

The product of its digits is 103680, while the sum is 46.

The square root of 149198185 is about 12214.6708920052. The cubic root of 149198185 is about 530.3808642497.

It can be divided in two parts, 14919 and 8185, that added together give a square (23104 = 152²).

The spelling of 149198185 in words is "one hundred forty-nine million, one hundred ninety-eight thousand, one hundred eighty-five".