23473781 has 2 divisors, whose sum is σ = 23473782. Its totient is φ = 23473780.

The previous prime is 23473763. The next prime is 23473819. The reversal of 23473781 is 18737432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20884900 + 2588881 = 4570^2 + 1609^2 .

It is a cyclic number.

It is not a de Polignac number, because 23473781 - 2¹⁸ = 23211637 is a prime.

It is a super-2 number, since 2×23473781² = 1102036788871922, which contains 22 as substring.

It is a Chen prime.

It is equal to p_1476197 and since 23473781 and 1476197 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23473081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11736890 + 11736891.

It is an arithmetic number, because the mean of its divisors is an integer number (11736891).

Almost surely, 2^23473781 is an apocalyptic number.

It is an amenable number.

23473781 is a deficient number, since it is larger than the sum of its proper divisors (1).

23473781 is an equidigital number, since it uses as much as digits as its factorization.

23473781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 35.

The square root of 23473781 is about 4844.9748193360. The cubic root of 23473781 is about 286.3261516279.

The spelling of 23473781 in words is "twenty-three million, four hundred seventy-three thousand, seven hundred eighty-one".