68699647 has 2 divisors, whose sum is σ = 68699648. Its totient is φ = 68699646.

The previous prime is 68699623. The next prime is 68699693. The reversal of 68699647 is 74699686.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68699647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68699747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34349823 + 34349824.

It is an arithmetic number, because the mean of its divisors is an integer number (34349824).

Almost surely, 2^68699647 is an apocalyptic number.

68699647 is a deficient number, since it is larger than the sum of its proper divisors (1).

68699647 is an equidigital number, since it uses as much as digits as its factorization.

68699647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3919104, while the sum is 55.

The square root of 68699647 is about 8288.5250195677. The cubic root of 68699647 is about 409.5605980641.

The spelling of 68699647 in words is "sixty-eight million, six hundred ninety-nine thousand, six hundred forty-seven".