323911273891 has 2 divisors, whose sum is σ = 323911273892. Its totient is φ = 323911273890.

The previous prime is 323911273799. The next prime is 323911273957. The reversal of 323911273891 is 198372119323.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 323911273891 - 2³⁵ = 289551535523 is a prime.

It is not a weakly prime, because it can be changed into another prime (323911273291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161955636945 + 161955636946.

It is an arithmetic number, because the mean of its divisors is an integer number (161955636946).

Almost surely, 2^323911273891 is an apocalyptic number.

323911273891 is a deficient number, since it is larger than the sum of its proper divisors (1).

323911273891 is an equidigital number, since it uses as much as digits as its factorization.

323911273891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 49.

The spelling of 323911273891 in words is "three hundred twenty-three billion, nine hundred eleven million, two hundred seventy-three thousand, eight hundred ninety-one".