148539989 has 4 divisors (see below), whose sum is σ = 159966156. Its totient is φ = 137113824.

The previous prime is 148539971. The next prime is 148539997. The reversal of 148539989 is 989935841.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 989935841 = 26053 ⋅37997.

It can be written as a sum of positive squares in 2 ways, for example, as 28462225 + 120077764 = 5335^2 + 10958^2 .

It is a cyclic number.

It is not a de Polignac number, because 148539989 - 2⁸ = 148539733 is a prime.

It is a super-3 number, since 3×148539989³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148539949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5713064 + ... + 5713089.

It is an arithmetic number, because the mean of its divisors is an integer number (39991539).

Almost surely, 2^148539989 is an apocalyptic number.

It is an amenable number.

148539989 is a deficient number, since it is larger than the sum of its proper divisors (11426167).

148539989 is a wasteful number, since it uses less digits than its factorization.

148539989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11426166.

The product of its digits is 2799360, while the sum is 56.

The square root of 148539989 is about 12187.6982650540. The cubic root of 148539989 is about 529.5997797364.

It can be divided in two parts, 14853 and 9989, that added together give a palindrome (24842).

The spelling of 148539989 in words is "one hundred forty-eight million, five hundred thirty-nine thousand, nine hundred eighty-nine".