67993378 has 4 divisors (see below), whose sum is σ = 101990070. Its totient is φ = 33996688.

The previous prime is 67993357. The next prime is 67993397. The reversal of 67993378 is 87339976.

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

It can be written as a sum of positive squares in only one way, i.e., 42863209 + 25130169 = 6547^2 + 5013^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16998343 + ... + 16998346.

Almost surely, 2^67993378 is an apocalyptic number.

67993378 is a deficient number, since it is larger than the sum of its proper divisors (33996692).

67993378 is a wasteful number, since it uses less digits than its factorization.

67993378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33996691.

The product of its digits is 1714608, while the sum is 52.

The square root of 67993378 is about 8245.8097237324. The cubic root of 67993378 is about 408.1522603890.

The spelling of 67993378 in words is "sixty-seven million, nine hundred ninety-three thousand, three hundred seventy-eight".