321228591979 has 2 divisors, whose sum is σ = 321228591980. Its totient is φ = 321228591978.

The previous prime is 321228591977. The next prime is 321228592031. The reversal of 321228591979 is 979195822123.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321228591979 - 2¹ = 321228591977 is a prime.

Together with 321228591977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (321228591977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160614295989 + 160614295990.

It is an arithmetic number, because the mean of its divisors is an integer number (160614295990).

Almost surely, 2^321228591979 is an apocalyptic number.

321228591979 is a deficient number, since it is larger than the sum of its proper divisors (1).

321228591979 is an equidigital number, since it uses as much as digits as its factorization.

321228591979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4898880, while the sum is 58.

The spelling of 321228591979 in words is "three hundred twenty-one billion, two hundred twenty-eight million, five hundred ninety-one thousand, nine hundred seventy-nine".