68687911 has 2 divisors, whose sum is σ = 68687912. Its totient is φ = 68687910.

The previous prime is 68687897. The next prime is 68687917. The reversal of 68687911 is 11978686.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68687911 - 2¹³ = 68679719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68687917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34343955 + 34343956.

It is an arithmetic number, because the mean of its divisors is an integer number (34343956).

Almost surely, 2^68687911 is an apocalyptic number.

68687911 is a deficient number, since it is larger than the sum of its proper divisors (1).

68687911 is an equidigital number, since it uses as much as digits as its factorization.

68687911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 46.

The square root of 68687911 is about 8287.8170225941. The cubic root of 68687911 is about 409.5372749122.

The spelling of 68687911 in words is "sixty-eight million, six hundred eighty-seven thousand, nine hundred eleven".