12320081989 has 2 divisors, whose sum is σ = 12320081990. Its totient is φ = 12320081988.

The previous prime is 12320081929. The next prime is 12320082017. The reversal of 12320081989 is 98918002321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10492519489 + 1827562500 = 102433^2 + 42750^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12320081989 is a prime.

It is a super-2 number, since 2×12320081989² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12320081929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6160040994 + 6160040995.

It is an arithmetic number, because the mean of its divisors is an integer number (6160040995).

Almost surely, 2^12320081989 is an apocalyptic number.

It is an amenable number.

12320081989 is a deficient number, since it is larger than the sum of its proper divisors (1).

12320081989 is an equidigital number, since it uses as much as digits as its factorization.

12320081989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 43.

The spelling of 12320081989 in words is "twelve billion, three hundred twenty million, eighty-one thousand, nine hundred eighty-nine".