123367681 has 4 divisors (see below), whose sum is σ = 125390164. Its totient is φ = 121345200.

The previous prime is 123367669. The next prime is 123367697. The reversal of 123367681 is 186763321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4906225 + 118461456 = 2215^2 + 10884^2 .

It is a cyclic number.

It is not a de Polignac number, because 123367681 - 2¹⁹ = 122843393 is a prime.

It is a super-2 number, since 2×123367681² = 30439169430635522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123367681.

It is not an unprimeable number, because it can be changed into a prime (123367081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1011150 + ... + 1011271.

It is an arithmetic number, because the mean of its divisors is an integer number (31347541).

Almost surely, 2^123367681 is an apocalyptic number.

It is an amenable number.

123367681 is a deficient number, since it is larger than the sum of its proper divisors (2022483).

123367681 is an equidigital number, since it uses as much as digits as its factorization.

123367681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2022482.

The product of its digits is 36288, while the sum is 37.

The square root of 123367681 is about 11107.1004767221. The cubic root of 123367681 is about 497.8140316791.

The spelling of 123367681 in words is "one hundred twenty-three million, three hundred sixty-seven thousand, six hundred eighty-one".