148939189 has 4 divisors (see below), whose sum is σ = 170216224. Its totient is φ = 127662156.

The previous prime is 148939181. The next prime is 148939207. The reversal of 148939189 is 981939841.

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: 981939841 = 1051 ⋅934291.

It is a cyclic number.

It is not a de Polignac number, because 148939189 - 2³ = 148939181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148939181) 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, 10638507 + ... + 10638520.

It is an arithmetic number, because the mean of its divisors is an integer number (42554056).

Almost surely, 2^148939189 is an apocalyptic number.

It is an amenable number.

148939189 is a deficient number, since it is larger than the sum of its proper divisors (21277035).

148939189 is an equidigital number, since it uses as much as digits as its factorization.

148939189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21277034.

The product of its digits is 559872, while the sum is 52.

The square root of 148939189 is about 12204.0644459131. The cubic root of 148939189 is about 530.0737870450.

The spelling of 148939189 in words is "one hundred forty-eight million, nine hundred thirty-nine thousand, one hundred eighty-nine".