23981641 has 2 divisors, whose sum is σ = 23981642. Its totient is φ = 23981640.

The previous prime is 23981623. The next prime is 23981647. The reversal of 23981641 is 14618932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23242041 + 739600 = 4821^2 + 860^2 .

It is a cyclic number.

It is not a de Polignac number, because 23981641 - 2¹³ = 23973449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23981597 and 23981606.

It is not a weakly prime, because it can be changed into another prime (23981647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11990820 + 11990821.

It is an arithmetic number, because the mean of its divisors is an integer number (11990821).

Almost surely, 2^23981641 is an apocalyptic number.

It is an amenable number.

23981641 is a deficient number, since it is larger than the sum of its proper divisors (1).

23981641 is an equidigital number, since it uses as much as digits as its factorization.

23981641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 34.

The square root of 23981641 is about 4897.1053695015. The cubic root of 23981641 is about 288.3763445773.

The spelling of 23981641 in words is "twenty-three million, nine hundred eighty-one thousand, six hundred forty-one".