321349685 has 4 divisors (see below), whose sum is σ = 385619628. Its totient is φ = 257079744.

The previous prime is 321349673. The next prime is 321349687. The reversal of 321349685 is 586943123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 586943123 = 13 ⋅45149471.

It can be written as a sum of positive squares in 2 ways, for example, as 213335236 + 108014449 = 14606^2 + 10393^2 .

It is a cyclic number.

It is not a de Polignac number, because 321349685 - 2⁸ = 321349429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321349687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32134964 + ... + 32134973.

It is an arithmetic number, because the mean of its divisors is an integer number (96404907).

Almost surely, 2^321349685 is an apocalyptic number.

It is an amenable number.

321349685 is a deficient number, since it is larger than the sum of its proper divisors (64269943).

321349685 is an equidigital number, since it uses as much as digits as its factorization.

321349685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64269942.

The product of its digits is 155520, while the sum is 41.

The square root of 321349685 is about 17926.2289676329. The cubic root of 321349685 is about 684.9506668789.

The spelling of 321349685 in words is "three hundred twenty-one million, three hundred forty-nine thousand, six hundred eighty-five".