68511799 has 2 divisors, whose sum is σ = 68511800. Its totient is φ = 68511798.

The previous prime is 68511797. The next prime is 68511809. The reversal of 68511799 is 99711586.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68511799 - 2¹ = 68511797 is a prime.

Together with 68511797, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68511797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34255899 + 34255900.

It is an arithmetic number, because the mean of its divisors is an integer number (34255900).

Almost surely, 2^68511799 is an apocalyptic number.

68511799 is a deficient number, since it is larger than the sum of its proper divisors (1).

68511799 is an equidigital number, since it uses as much as digits as its factorization.

68511799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 46.

The square root of 68511799 is about 8277.1854515892. The cubic root of 68511799 is about 409.1869650519.

The spelling of 68511799 in words is "sixty-eight million, five hundred eleven thousand, seven hundred ninety-nine".