123173647 has 2 divisors, whose sum is σ = 123173648. Its totient is φ = 123173646.

The previous prime is 123173639. The next prime is 123173693. The reversal of 123173647 is 746371321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123173647 - 2³ = 123173639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123173627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61586823 + 61586824.

It is an arithmetic number, because the mean of its divisors is an integer number (61586824).

Almost surely, 2^123173647 is an apocalyptic number.

123173647 is a deficient number, since it is larger than the sum of its proper divisors (1).

123173647 is an equidigital number, since it uses as much as digits as its factorization.

123173647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 34.

The square root of 123173647 is about 11098.3623566723. The cubic root of 123173647 is about 497.5529056638.

The spelling of 123173647 in words is "one hundred twenty-three million, one hundred seventy-three thousand, six hundred forty-seven".