149987 has 4 divisors (see below), whose sum is σ = 151296. Its totient is φ = 148680.

The previous prime is 149971. The next prime is 149993. The reversal of 149987 is 789941.

149987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 149987 - 2⁴ = 149971 is a prime.

It is a super-2 number, since 2×149987² = 44992200338, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 149987.

It is not an unprimeable number, because it can be changed into a prime (149087) 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, 464 + ... + 717.

It is an arithmetic number, because the mean of its divisors is an integer number (37824).

2¹⁴⁹⁹⁸⁷ is an apocalyptic number.

149987 is a deficient number, since it is larger than the sum of its proper divisors (1309).

149987 is a wasteful number, since it uses less digits than its factorization.

149987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308.

The product of its digits is 18144, while the sum is 38.

The square root of 149987 is about 387.2815513293. The cubic root of 149987 is about 53.1313934635.

It can be divided in two parts, 14 and 9987, that added together give a palindrome (10001).

The spelling of 149987 in words is "one hundred forty-nine thousand, nine hundred eighty-seven".