323273987891 has 2 divisors, whose sum is σ = 323273987892. Its totient is φ = 323273987890.

The previous prime is 323273987849. The next prime is 323273987899. The reversal of 323273987891 is 198789372323.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 323273987891 - 2²⁶ = 323206879027 is a prime.

It is not a weakly prime, because it can be changed into another prime (323273987899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161636993945 + 161636993946.

It is an arithmetic number, because the mean of its divisors is an integer number (161636993946).

Almost surely, 2^323273987891 is an apocalyptic number.

323273987891 is a deficient number, since it is larger than the sum of its proper divisors (1).

323273987891 is an equidigital number, since it uses as much as digits as its factorization.

323273987891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27433728, while the sum is 62.

The spelling of 323273987891 in words is "three hundred twenty-three billion, two hundred seventy-three million, nine hundred eighty-seven thousand, eight hundred ninety-one".