23905143389 has 2 divisors, whose sum is σ = 23905143390. Its totient is φ = 23905143388.

The previous prime is 23905143349. The next prime is 23905143391. The reversal of 23905143389 is 98334150932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16830651289 + 7074492100 = 129733^2 + 84110^2 .

It is a cyclic number.

It is not a de Polignac number, because 23905143389 - 2³² = 19610176093 is a prime.

Together with 23905143391, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23905143319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11952571694 + 11952571695.

It is an arithmetic number, because the mean of its divisors is an integer number (11952571695).

Almost surely, 2^23905143389 is an apocalyptic number.

It is an amenable number.

23905143389 is a deficient number, since it is larger than the sum of its proper divisors (1).

23905143389 is an equidigital number, since it uses as much as digits as its factorization.

23905143389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 699840, while the sum is 47.

The spelling of 23905143389 in words is "twenty-three billion, nine hundred five million, one hundred forty-three thousand, three hundred eighty-nine".