67968891 has 12 divisors (see below), whose sum is σ = 98320768. Its totient is φ = 45246384.

The previous prime is 67968829. The next prime is 67968899. The reversal of 67968891 is 19886976.

It is not a de Polignac number, because 67968891 - 2⁷ = 67968763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67968899) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1446 + ... + 11748.

Almost surely, 2^67968891 is an apocalyptic number.

67968891 is a deficient number, since it is larger than the sum of its proper divisors (30351877).

67968891 is a wasteful number, since it uses less digits than its factorization.

67968891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11042 (or 11039 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 67968891 is about 8244.3247752621. The cubic root of 67968891 is about 408.1032574580.

The spelling of 67968891 in words is "sixty-seven million, nine hundred sixty-eight thousand, eight hundred ninety-one".