68199787 has 2 divisors, whose sum is σ = 68199788. Its totient is φ = 68199786.

The previous prime is 68199757. The next prime is 68199809. The reversal of 68199787 is 78799186.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68199787 - 2²³ = 59811179 is a prime.

It is not a weakly prime, because it can be changed into another prime (68199707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34099893 + 34099894.

It is an arithmetic number, because the mean of its divisors is an integer number (34099894).

Almost surely, 2^68199787 is an apocalyptic number.

68199787 is a deficient number, since it is larger than the sum of its proper divisors (1).

68199787 is an equidigital number, since it uses as much as digits as its factorization.

68199787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 55.

The square root of 68199787 is about 8258.3162327438. The cubic root of 68199787 is about 408.5648554408.

It can be divided in two parts, 68199 and 787, that added together give a palindrome (68986).

The spelling of 68199787 in words is "sixty-eight million, one hundred ninety-nine thousand, seven hundred eighty-seven".