68817733 has 2 divisors, whose sum is σ = 68817734. Its totient is φ = 68817732.

The previous prime is 68817731. The next prime is 68817739. The reversal of 68817733 is 33771886.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66863329 + 1954404 = 8177^2 + 1398^2 .

It is a cyclic number.

It is not a de Polignac number, because 68817733 - 2¹ = 68817731 is a prime.

Together with 68817731, it forms a pair of twin primes.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 68817733.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68817731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34408866 + 34408867.

It is an arithmetic number, because the mean of its divisors is an integer number (34408867).

Almost surely, 2^68817733 is an apocalyptic number.

It is an amenable number.

68817733 is a deficient number, since it is larger than the sum of its proper divisors (1).

68817733 is an equidigital number, since it uses as much as digits as its factorization.

68817733 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 43.

The square root of 68817733 is about 8295.6454239559. The cubic root of 68817733 is about 409.7951246891.

The spelling of 68817733 in words is "sixty-eight million, eight hundred seventeen thousand, seven hundred thirty-three".