68202191 has 4 divisors (see below), whose sum is σ = 71791800. Its totient is φ = 64612584.

The previous prime is 68202119. The next prime is 68202193. The reversal of 68202191 is 19120286.

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

It is a cyclic number.

It is not a de Polignac number, because 68202191 - 2¹⁰ = 68201167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68202193) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 1794776 + ... + 1794813.

It is an arithmetic number, because the mean of its divisors is an integer number (17947950).

Almost surely, 2^68202191 is an apocalyptic number.

68202191 is a deficient number, since it is larger than the sum of its proper divisors (3589609).

68202191 is a wasteful number, since it uses less digits than its factorization.

68202191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3589608.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 68202191 is about 8258.4617817121. The cubic root of 68202191 is about 408.5696559366.

The spelling of 68202191 in words is "sixty-eight million, two hundred two thousand, one hundred ninety-one".