123009647 has 2 divisors, whose sum is σ = 123009648. Its totient is φ = 123009646.

The previous prime is 123009563. The next prime is 123009673. The reversal of 123009647 is 746900321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123009647 - 2⁸ = 123009391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123009247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61504823 + 61504824.

It is an arithmetic number, because the mean of its divisors is an integer number (61504824).

Almost surely, 2^123009647 is an apocalyptic number.

123009647 is a deficient number, since it is larger than the sum of its proper divisors (1).

123009647 is an equidigital number, since it uses as much as digits as its factorization.

123009647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 123009647 is about 11090.9714182302. The cubic root of 123009647 is about 497.3319847112.

Adding to 123009647 its reverse (746900321), we get a palindrome (869909968).

The spelling of 123009647 in words is "one hundred twenty-three million, nine thousand, six hundred forty-seven".