123040681 has 2 divisors, whose sum is σ = 123040682. Its totient is φ = 123040680.

The previous prime is 123040669. The next prime is 123040693. The reversal of 123040681 is 186040321.

It is a balanced prime because it is at equal distance from previous prime (123040669) and next prime (123040693).

It can be written as a sum of positive squares in only one way, i.e., 86025625 + 37015056 = 9275^2 + 6084^2 .

It is a cyclic number.

It is not a de Polignac number, because 123040681 - 2⁷ = 123040553 is a prime.

It is a super-2 number, since 2×123040681² = 30278018361887522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123040601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61520340 + 61520341.

It is an arithmetic number, because the mean of its divisors is an integer number (61520341).

Almost surely, 2^123040681 is an apocalyptic number.

It is an amenable number.

123040681 is a deficient number, since it is larger than the sum of its proper divisors (1).

123040681 is an equidigital number, since it uses as much as digits as its factorization.

123040681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 123040681 is about 11092.3703959073. The cubic root of 123040681 is about 497.3738050166.

The spelling of 123040681 in words is "one hundred twenty-three million, forty thousand, six hundred eighty-one".