12309845887 has 2 divisors, whose sum is σ = 12309845888. Its totient is φ = 12309845886.

The previous prime is 12309845839. The next prime is 12309845903. The reversal of 12309845887 is 78854890321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12309845887 - 2⁷ = 12309845759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12309815887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6154922943 + 6154922944.

It is an arithmetic number, because the mean of its divisors is an integer number (6154922944).

Almost surely, 2^12309845887 is an apocalyptic number.

12309845887 is a deficient number, since it is larger than the sum of its proper divisors (1).

12309845887 is an equidigital number, since it uses as much as digits as its factorization.

12309845887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3870720, while the sum is 55.

The spelling of 12309845887 in words is "twelve billion, three hundred nine million, eight hundred forty-five thousand, eight hundred eighty-seven".