23390641 has 2 divisors, whose sum is σ = 23390642. Its totient is φ = 23390640.

The previous prime is 23390639. The next prime is 23390669. The reversal of 23390641 is 14609332.

It is an a-pointer prime, because the next prime (23390669) can be obtained adding 23390641 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18533025 + 4857616 = 4305^2 + 2204^2 .

It is a cyclic number.

It is not a de Polignac number, because 23390641 - 2¹ = 23390639 is a prime.

Together with 23390639, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23390611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11695320 + 11695321.

It is an arithmetic number, because the mean of its divisors is an integer number (11695321).

Almost surely, 2^23390641 is an apocalyptic number.

It is an amenable number.

23390641 is a deficient number, since it is larger than the sum of its proper divisors (1).

23390641 is an equidigital number, since it uses as much as digits as its factorization.

23390641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 23390641 is about 4836.3871846658. The cubic root of 23390641 is about 285.9877128077.

Adding to 23390641 its reverse (14609332), we get a palindrome (37999973).

The spelling of 23390641 in words is "twenty-three million, three hundred ninety thousand, six hundred forty-one".