68191349 has 2 divisors, whose sum is σ = 68191350. Its totient is φ = 68191348.

The previous prime is 68191309. The next prime is 68191367. The reversal of 68191349 is 94319186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64915249 + 3276100 = 8057^2 + 1810^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68191349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68191309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34095674 + 34095675.

It is an arithmetic number, because the mean of its divisors is an integer number (34095675).

Almost surely, 2^68191349 is an apocalyptic number.

It is an amenable number.

68191349 is a deficient number, since it is larger than the sum of its proper divisors (1).

68191349 is an equidigital number, since it uses as much as digits as its factorization.

68191349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 41.

The square root of 68191349 is about 8257.8053379818. The cubic root of 68191349 is about 408.5480048875.

The spelling of 68191349 in words is "sixty-eight million, one hundred ninety-one thousand, three hundred forty-nine".