123075989 has 4 divisors (see below), whose sum is σ = 123140160. Its totient is φ = 123011820.

The previous prime is 123075923. The next prime is 123075991. The reversal of 123075989 is 989570321.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123075989 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 (123075889) 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, 29117 + ... + 33074.

It is an arithmetic number, because the mean of its divisors is an integer number (30785040).

Almost surely, 2^123075989 is an apocalyptic number.

It is an amenable number.

123075989 is a deficient number, since it is larger than the sum of its proper divisors (64171).

123075989 is an equidigital number, since it uses as much as digits as its factorization.

123075989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64170.

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 123075989 is about 11093.9618261467. The cubic root of 123075989 is about 497.4213762606.

The spelling of 123075989 in words is "one hundred twenty-three million, seventy-five thousand, nine hundred eighty-nine".