23391891828787 has 2 divisors, whose sum is σ = 23391891828788. Its totient is φ = 23391891828786.

The previous prime is 23391891828761. The next prime is 23391891828871. The reversal of 23391891828787 is 78782819819332.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23391891828787 - 2⁷ = 23391891828659 is a prime.

It is not a weakly prime, because it can be changed into another prime (23391891828707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11695945914393 + 11695945914394.

It is an arithmetic number, because the mean of its divisors is an integer number (11695945914394).

Almost surely, 2^{23391891828787} is an apocalyptic number.

23391891828787 is a deficient number, since it is larger than the sum of its proper divisors (1).

23391891828787 is an equidigital number, since it uses as much as digits as its factorization.

23391891828787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 585252864, while the sum is 76.

The spelling of 23391891828787 in words is "twenty-three trillion, three hundred ninety-one billion, eight hundred ninety-one million, eight hundred twenty-eight thousand, seven hundred eighty-seven".