1323220985 has 4 divisors (see below), whose sum is σ = 1587865188. Its totient is φ = 1058576784.

The previous prime is 1323220979. The next prime is 1323220991. The reversal of 1323220985 is 5890223231.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1323220979) and next prime (1323220991).

It can be written as a sum of positive squares in 2 ways, for example, as 817330921 + 505890064 = 28589^2 + 22492^2 .

It is a cyclic number.

It is not a de Polignac number, because 1323220985 - 2¹⁸ = 1322958841 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132322094 + ... + 132322103.

It is an arithmetic number, because the mean of its divisors is an integer number (396966297).

Almost surely, 2^1323220985 is an apocalyptic number.

It is an amenable number.

1323220985 is a deficient number, since it is larger than the sum of its proper divisors (264644203).

1323220985 is an equidigital number, since it uses as much as digits as its factorization.

1323220985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264644202.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 1323220985 is about 36376.1045880397. The cubic root of 1323220985 is about 1097.8528321794.

The spelling of 1323220985 in words is "one billion, three hundred twenty-three million, two hundred twenty thousand, nine hundred eighty-five".