123798647 has 16 divisors (see below), whose sum is σ = 146553600. Its totient is φ = 104509944.

The previous prime is 123798643. The next prime is 123798667. The reversal of 123798647 is 746897321.

It is not a de Polignac number, because 123798647 - 2² = 123798643 is a prime.

It is a super-2 number, since 2×123798647² = 30652209998061218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123798643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20288 + ... + 25674.

It is an arithmetic number, because the mean of its divisors is an integer number (9159600).

Almost surely, 2^123798647 is an apocalyptic number.

123798647 is a deficient number, since it is larger than the sum of its proper divisors (22754953).

123798647 is an frugal number, since it uses more digits than its factorization.

123798647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5475 (or 5461 counting only the distinct ones).

The product of its digits is 508032, while the sum is 47.

The square root of 123798647 is about 11126.4840358489. The cubic root of 123798647 is about 498.3930368720.

The spelling of 123798647 in words is "one hundred twenty-three million, seven hundred ninety-eight thousand, six hundred forty-seven".