23019539 has 2 divisors, whose sum is σ = 23019540. Its totient is φ = 23019538.

The previous prime is 23019517. The next prime is 23019571. The reversal of 23019539 is 93591032.

It is an a-pointer prime, because the next prime (23019571) can be obtained adding 23019539 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23019539 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23019739) 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, 11509769 + 11509770.

It is an arithmetic number, because the mean of its divisors is an integer number (11509770).

Almost surely, 2^23019539 is an apocalyptic number.

23019539 is a deficient number, since it is larger than the sum of its proper divisors (1).

23019539 is an equidigital number, since it uses as much as digits as its factorization.

23019539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7290, while the sum is 32.

The square root of 23019539 is about 4797.8681724283. The cubic root of 23019539 is about 284.4672060858.

The spelling of 23019539 in words is "twenty-three million, nineteen thousand, five hundred thirty-nine".