67220393 has 4 divisors (see below), whose sum is σ = 67237380. Its totient is φ = 67203408.

The previous prime is 67220383. The next prime is 67220399. The reversal of 67220393 is 39302276.

It is a happy number.

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 65237929 + 1982464 = 8077^2 + 1408^2 .

It is a cyclic number.

It is not a de Polignac number, because 67220393 - 2²⁴ = 50443177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67220399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 923 + ... + 11631.

It is an arithmetic number, because the mean of its divisors is an integer number (16809345).

Almost surely, 2^67220393 is an apocalyptic number.

It is an amenable number.

67220393 is a deficient number, since it is larger than the sum of its proper divisors (16987).

67220393 is a wasteful number, since it uses less digits than its factorization.

67220393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16986.

The product of its (nonzero) digits is 13608, while the sum is 32.

The square root of 67220393 is about 8198.8043640521. The cubic root of 67220393 is about 406.5996643025.

The spelling of 67220393 in words is "sixty-seven million, two hundred twenty thousand, three hundred ninety-three".