148989 has 4 divisors (see below), whose sum is σ = 198656. Its totient is φ = 99324.

The previous prime is 148961. The next prime is 148991. The reversal of 148989 is 989841.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 989841 = 3 ⋅329947.

It is not a de Polignac number, because 148989 - 2⁵ = 148957 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 148989.

It is not an unprimeable number, because it can be changed into a prime (148949) 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, 24829 + ... + 24834.

It is an arithmetic number, because the mean of its divisors is an integer number (49664).

2¹⁴⁸⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

148989 is a deficient number, since it is larger than the sum of its proper divisors (49667).

148989 is an equidigital number, since it uses as much as digits as its factorization.

148989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49666.

The product of its digits is 20736, while the sum is 39.

The square root of 148989 is about 385.9909325360. The cubic root of 148989 is about 53.0132872821.

The spelling of 148989 in words is "one hundred forty-eight thousand, nine hundred eighty-nine".