149818685 has 4 divisors (see below), whose sum is σ = 179782428. Its totient is φ = 119854944.

The previous prime is 149818639. The next prime is 149818687. The reversal of 149818685 is 586818941.

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

It can be written as a sum of positive squares in 2 ways, for example, as 89321401 + 60497284 = 9451^2 + 7778^2 .

It is a cyclic number.

It is not a de Polignac number, because 149818685 - 2⁶ = 149818621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149818687) 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, 14981864 + ... + 14981873.

It is an arithmetic number, because the mean of its divisors is an integer number (44945607).

Almost surely, 2^149818685 is an apocalyptic number.

It is an amenable number.

149818685 is a deficient number, since it is larger than the sum of its proper divisors (29963743).

149818685 is an equidigital number, since it uses as much as digits as its factorization.

149818685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29963742.

The product of its digits is 552960, while the sum is 50.

The square root of 149818685 is about 12240.0443218152. The cubic root of 149818685 is about 531.1151138979.

The spelling of 149818685 in words is "one hundred forty-nine million, eight hundred eighteen thousand, six hundred eighty-five".