68697571 has 2 divisors, whose sum is σ = 68697572. Its totient is φ = 68697570.

The previous prime is 68697569. The next prime is 68697583. The reversal of 68697571 is 17579686.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68697571 - 2¹ = 68697569 is a prime.

It is a super-2 number, since 2×68697571² = 9438712522600082, which contains 22 as substring.

Together with 68697569, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (68697511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34348785 + 34348786.

It is an arithmetic number, because the mean of its divisors is an integer number (34348786).

Almost surely, 2^68697571 is an apocalyptic number.

68697571 is a deficient number, since it is larger than the sum of its proper divisors (1).

68697571 is an equidigital number, since it uses as much as digits as its factorization.

68697571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 635040, while the sum is 49.

The square root of 68697571 is about 8288.3997852420. The cubic root of 68697571 is about 409.5564725875.

The spelling of 68697571 in words is "sixty-eight million, six hundred ninety-seven thousand, five hundred seventy-one".