68812191 has 12 divisors (see below), whose sum is σ = 113594832. Its totient is φ = 39321216.

The previous prime is 68812187. The next prime is 68812199. The reversal of 68812191 is 19121886.

It is not a de Polignac number, because 68812191 - 2² = 68812187 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68812199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 546066 + ... + 546191.

It is an arithmetic number, because the mean of its divisors is an integer number (9466236).

Almost surely, 2^68812191 is an apocalyptic number.

68812191 is a deficient number, since it is larger than the sum of its proper divisors (44782641).

68812191 is a wasteful number, since it uses less digits than its factorization.

68812191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092270 (or 1092267 counting only the distinct ones).

The product of its digits is 6912, while the sum is 36.

The square root of 68812191 is about 8295.3113865605. The cubic root of 68812191 is about 409.7841239124.

The spelling of 68812191 in words is "sixty-eight million, eight hundred twelve thousand, one hundred ninety-one".