123749589 has 4 divisors (see below), whose sum is σ = 164999456. Its totient is φ = 82499724.

The previous prime is 123749573. The next prime is 123749599. The reversal of 123749589 is 985947321.

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: 985947321 = 3 ⋅328649107.

It is not a de Polignac number, because 123749589 - 2⁴ = 123749573 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 (123749599) 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, 20624929 + ... + 20624934.

It is an arithmetic number, because the mean of its divisors is an integer number (41249864).

Almost surely, 2^123749589 is an apocalyptic number.

It is an amenable number.

123749589 is a deficient number, since it is larger than the sum of its proper divisors (41249867).

123749589 is an equidigital number, since it uses as much as digits as its factorization.

123749589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41249866.

The product of its digits is 544320, while the sum is 48.

The square root of 123749589 is about 11124.2792575519. The cubic root of 123749589 is about 498.3271950216.

The spelling of 123749589 in words is "one hundred twenty-three million, seven hundred forty-nine thousand, five hundred eighty-nine".