67964321 has 4 divisors (see below), whose sum is σ = 67987092. Its totient is φ = 67941552.

The previous prime is 67964297. The next prime is 67964327. The reversal of 67964321 is 12346976.

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

It can be written as a sum of positive squares in 2 ways, for example, as 31192225 + 36772096 = 5585^2 + 6064^2 .

It is a cyclic number.

It is not a de Polignac number, because 67964321 - 2²² = 63770017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67964327) 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, 6086 + ... + 13151.

It is an arithmetic number, because the mean of its divisors is an integer number (16996773).

Almost surely, 2^67964321 is an apocalyptic number.

It is an amenable number.

67964321 is a deficient number, since it is larger than the sum of its proper divisors (22771).

67964321 is a wasteful number, since it uses less digits than its factorization.

67964321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22770.

The product of its digits is 54432, while the sum is 38.

The square root of 67964321 is about 8244.0476102458. The cubic root of 67964321 is about 408.0941107555.

The spelling of 67964321 in words is "sixty-seven million, nine hundred sixty-four thousand, three hundred twenty-one".