68685311 has 6 divisors (see below), whose sum is σ = 71136312. Its totient is φ = 66316040.

The previous prime is 68685301. The next prime is 68685313. The reversal of 68685311 is 11358686.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-68685311 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 (68685313) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39995 + ... + 41676.

It is an arithmetic number, because the mean of its divisors is an integer number (11856052).

Almost surely, 2^68685311 is an apocalyptic number.

68685311 is a deficient number, since it is larger than the sum of its proper divisors (2451001).

68685311 is an equidigital number, since it uses as much as digits as its factorization.

68685311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81729 (or 81700 counting only the distinct ones).

The product of its digits is 34560, while the sum is 38.

The square root of 68685311 is about 8287.6601643648. The cubic root of 68685311 is about 409.5321075286.

The spelling of 68685311 in words is "sixty-eight million, six hundred eighty-five thousand, three hundred eleven".