23378489 has 2 divisors, whose sum is σ = 23378490. Its totient is φ = 23378488.

The previous prime is 23378479. The next prime is 23378501. The reversal of 23378489 is 98487332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20430400 + 2948089 = 4520^2 + 1717^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23378489 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23378479) 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, 11689244 + 11689245.

It is an arithmetic number, because the mean of its divisors is an integer number (11689245).

Almost surely, 2^23378489 is an apocalyptic number.

It is an amenable number.

23378489 is a deficient number, since it is larger than the sum of its proper divisors (1).

23378489 is an equidigital number, since it uses as much as digits as its factorization.

23378489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 44.

The square root of 23378489 is about 4835.1307117802. The cubic root of 23378489 is about 285.9381783993.

The spelling of 23378489 in words is "twenty-three million, three hundred seventy-eight thousand, four hundred eighty-nine".