23661731 has 2 divisors, whose sum is σ = 23661732. Its totient is φ = 23661730.

The previous prime is 23661721. The next prime is 23661749. The reversal of 23661731 is 13716632.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23661731 is a prime.

It is a super-2 number, since 2×23661731² = 1119755027832722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23661694 and 23661703.

It is not a weakly prime, because it can be changed into another prime (23661721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11830865 + 11830866.

It is an arithmetic number, because the mean of its divisors is an integer number (11830866).

Almost surely, 2^23661731 is an apocalyptic number.

23661731 is a deficient number, since it is larger than the sum of its proper divisors (1).

23661731 is an equidigital number, since it uses as much as digits as its factorization.

23661731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 29.

The square root of 23661731 is about 4864.3325338632. The cubic root of 23661731 is about 287.0883070294.

The spelling of 23661731 in words is "twenty-three million, six hundred sixty-one thousand, seven hundred thirty-one".