123730681 has 2 divisors, whose sum is σ = 123730682. Its totient is φ = 123730680.

The previous prime is 123730667. The next prime is 123730697. The reversal of 123730681 is 186037321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101828281 + 21902400 = 10091^2 + 4680^2 .

It is an emirp because it is prime and its reverse (186037321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123730681 is a prime.

It is a super-2 number, since 2×123730681² = 30618562841447522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123731681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61865340 + 61865341.

It is an arithmetic number, because the mean of its divisors is an integer number (61865341).

Almost surely, 2^123730681 is an apocalyptic number.

It is an amenable number.

123730681 is a deficient number, since it is larger than the sum of its proper divisors (1).

123730681 is an equidigital number, since it uses as much as digits as its factorization.

123730681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 123730681 is about 11123.4293722754. The cubic root of 123730681 is about 498.3018135218.

The spelling of 123730681 in words is "one hundred twenty-three million, seven hundred thirty thousand, six hundred eighty-one".