123423647 has 2 divisors, whose sum is σ = 123423648. Its totient is φ = 123423646.

The previous prime is 123423637. The next prime is 123423683. The reversal of 123423647 is 746324321.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123423647 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123423607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61711823 + 61711824.

It is an arithmetic number, because the mean of its divisors is an integer number (61711824).

Almost surely, 2^123423647 is an apocalyptic number.

123423647 is a deficient number, since it is larger than the sum of its proper divisors (1).

123423647 is an equidigital number, since it uses as much as digits as its factorization.

123423647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 32.

The square root of 123423647 is about 11109.6195704443. The cubic root of 123423647 is about 497.8892984154.

Adding to 123423647 its reverse (746324321), we get a palindrome (869747968).

The spelling of 123423647 in words is "one hundred twenty-three million, four hundred twenty-three thousand, six hundred forty-seven".