23780681 has 2 divisors, whose sum is σ = 23780682. Its totient is φ = 23780680.

The previous prime is 23780657. The next prime is 23780707. The reversal of 23780681 is 18608732.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12996025 + 10784656 = 3605^2 + 3284^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23780681 is a prime.

It is a super-2 number, since 2×23780681² = 1131041577647522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23780651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11890340 + 11890341.

It is an arithmetic number, because the mean of its divisors is an integer number (11890341).

Almost surely, 2^23780681 is an apocalyptic number.

It is an amenable number.

23780681 is a deficient number, since it is larger than the sum of its proper divisors (1).

23780681 is an equidigital number, since it uses as much as digits as its factorization.

23780681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 23780681 is about 4876.5439606344. The cubic root of 23780681 is about 287.5685774657.

The spelling of 23780681 in words is "twenty-three million, seven hundred eighty thousand, six hundred eighty-one".