149843 has 4 divisors (see below), whose sum is σ = 155040. Its totient is φ = 144648.

The previous prime is 149839. The next prime is 149861. The reversal of 149843 is 348941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 348941 = 173 ⋅2017.

It is a cyclic number.

It is not a de Polignac number, because 149843 - 2² = 149839 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 5167 = 149843 / (1 + 4 + 9 + 8 + 4 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149803) 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, 2555 + ... + 2612.

It is an arithmetic number, because the mean of its divisors is an integer number (38760).

2¹⁴⁹⁸⁴³ is an apocalyptic number.

149843 is a deficient number, since it is larger than the sum of its proper divisors (5197).

149843 is an equidigital number, since it uses as much as digits as its factorization.

149843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5196.

The product of its digits is 3456, while the sum is 29.

The square root of 149843 is about 387.0955954283. The cubic root of 149843 is about 53.1143844995.

The spelling of 149843 in words is "one hundred forty-nine thousand, eight hundred forty-three".