321960673 has 2 divisors, whose sum is σ = 321960674. Its totient is φ = 321960672.

The previous prime is 321960641. The next prime is 321960679. The reversal of 321960673 is 376069123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206870689 + 115089984 = 14383^2 + 10728^2 .

It is a cyclic number.

It is not a de Polignac number, because 321960673 - 2⁵ = 321960641 is a prime.

It is a super-2 number, since 2×321960673² = 207317349917225858, which contains 22 as substring.

It is equal to p_17375194 and since 321960673 and 17375194 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (321960679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160980336 + 160980337.

It is an arithmetic number, because the mean of its divisors is an integer number (160980337).

Almost surely, 2^321960673 is an apocalyptic number.

It is an amenable number.

321960673 is a deficient number, since it is larger than the sum of its proper divisors (1).

321960673 is an equidigital number, since it uses as much as digits as its factorization.

321960673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 321960673 is about 17943.2626074524. The cubic root of 321960673 is about 685.3844950995.

The spelling of 321960673 in words is "three hundred twenty-one million, nine hundred sixty thousand, six hundred seventy-three".