149818 has 8 divisors (see below), whose sum is σ = 226548. Its totient is φ = 74304.

The previous prime is 149803. The next prime is 149827. The reversal of 149818 is 818941.

It can be written as a sum of positive squares in 2 ways, for example, as 149769 + 49 = 387^2 + 7^2 .

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

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 149818.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130 + ... + 562.

2¹⁴⁹⁸¹⁸ is an apocalyptic number.

149818 is a deficient number, since it is larger than the sum of its proper divisors (76730).

149818 is a wasteful number, since it uses less digits than its factorization.

149818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608.

The product of its digits is 2304, while the sum is 31.

The square root of 149818 is about 387.0633023163. The cubic root of 149818 is about 53.1114304443. Note that the first 3 decimals are identical.

The spelling of 149818 in words is "one hundred forty-nine thousand, eight hundred eighteen".