68843491 has 4 divisors (see below), whose sum is σ = 69028432. Its totient is φ = 68658552.

The previous prime is 68843461. The next prime is 68843497. The reversal of 68843491 is 19434886.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19434886 = 2 ⋅9717443.

It is a cyclic number.

It is not a de Polignac number, because 68843491 - 2²³ = 60454883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68843497) 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, 91911 + ... + 92656.

It is an arithmetic number, because the mean of its divisors is an integer number (17257108).

Almost surely, 2^68843491 is an apocalyptic number.

68843491 is a deficient number, since it is larger than the sum of its proper divisors (184941).

68843491 is a wasteful number, since it uses less digits than its factorization.

68843491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184940.

The product of its digits is 165888, while the sum is 43.

The square root of 68843491 is about 8297.1977799737. The cubic root of 68843491 is about 409.8462461355.

The spelling of 68843491 in words is "sixty-eight million, eight hundred forty-three thousand, four hundred ninety-one".