68577749 has 2 divisors, whose sum is σ = 68577750. Its totient is φ = 68577748.

The previous prime is 68577727. The next prime is 68577787. The reversal of 68577749 is 94777586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64802500 + 3775249 = 8050^2 + 1943^2 .

It is a cyclic number.

It is not a de Polignac number, because 68577749 - 2⁸ = 68577493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68577749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68577799) 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, 34288874 + 34288875.

It is an arithmetic number, because the mean of its divisors is an integer number (34288875).

Almost surely, 2^68577749 is an apocalyptic number.

It is an amenable number.

68577749 is a deficient number, since it is larger than the sum of its proper divisors (1).

68577749 is an equidigital number, since it uses as much as digits as its factorization.

68577749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2963520, while the sum is 53.

The square root of 68577749 is about 8281.1683354464. The cubic root of 68577749 is about 409.3182184828.

The spelling of 68577749 in words is "sixty-eight million, five hundred seventy-seven thousand, seven hundred forty-nine".