149983 has 4 divisors (see below), whose sum is σ = 156528. Its totient is φ = 143440.

The previous prime is 149971. The next prime is 149993. The reversal of 149983 is 389941.

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 149983 - 2¹⁷ = 18911 is a prime.

It is a Duffinian number.

149983 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3238 + ... + 3283.

It is an arithmetic number, because the mean of its divisors is an integer number (39132).

2¹⁴⁹⁹⁸³ is an apocalyptic number.

149983 is a deficient number, since it is larger than the sum of its proper divisors (6545).

149983 is an equidigital number, since it uses as much as digits as its factorization.

149983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6544.

The product of its digits is 7776, while the sum is 34.

The square root of 149983 is about 387.2763870932. The cubic root of 149983 is about 53.1309211393.

The spelling of 149983 in words is "one hundred forty-nine thousand, nine hundred eighty-three".