321299977 has 2 divisors, whose sum is σ = 321299978. Its totient is φ = 321299976.

The previous prime is 321299963. The next prime is 321300011. The reversal of 321299977 is 779992123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 308740041 + 12559936 = 17571^2 + 3544^2 .

It is a cyclic number.

It is not a de Polignac number, because 321299977 - 2²³ = 312911369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 321299977.

It is not a weakly prime, because it can be changed into another prime (321299917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160649988 + 160649989.

It is an arithmetic number, because the mean of its divisors is an integer number (160649989).

Almost surely, 2^321299977 is an apocalyptic number.

It is an amenable number.

321299977 is a deficient number, since it is larger than the sum of its proper divisors (1).

321299977 is an equidigital number, since it uses as much as digits as its factorization.

321299977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 428652, while the sum is 49.

The square root of 321299977 is about 17924.8424539799. The cubic root of 321299977 is about 684.9153478427.

The spelling of 321299977 in words is "three hundred twenty-one million, two hundred ninety-nine thousand, nine hundred seventy-seven".