123147389 has 2 divisors, whose sum is σ = 123147390. Its totient is φ = 123147388.

The previous prime is 123147373. The next prime is 123147397. The reversal of 123147389 is 983741321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92256025 + 30891364 = 9605^2 + 5558^2 .

It is a cyclic number.

It is not a de Polignac number, because 123147389 - 2⁴ = 123147373 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123147329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61573694 + 61573695.

It is an arithmetic number, because the mean of its divisors is an integer number (61573695).

Almost surely, 2^123147389 is an apocalyptic number.

It is an amenable number.

123147389 is a deficient number, since it is larger than the sum of its proper divisors (1).

123147389 is an equidigital number, since it uses as much as digits as its factorization.

123147389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 123147389 is about 11097.1793262973. The cubic root of 123147389 is about 497.5175472545.

The spelling of 123147389 in words is "one hundred twenty-three million, one hundred forty-seven thousand, three hundred eighty-nine".