68877569 has 2 divisors, whose sum is σ = 68877570. Its totient is φ = 68877568.

The previous prime is 68877563. The next prime is 68877577. The reversal of 68877569 is 96577886.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46076944 + 22800625 = 6788^2 + 4775^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68877569 is a prime.

It is a super-2 number, since 2×68877569² = 9488239022699522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68877563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34438784 + 34438785.

It is an arithmetic number, because the mean of its divisors is an integer number (34438785).

Almost surely, 2^68877569 is an apocalyptic number.

It is an amenable number.

68877569 is a deficient number, since it is larger than the sum of its proper divisors (1).

68877569 is an equidigital number, since it uses as much as digits as its factorization.

68877569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5080320, while the sum is 56.

The square root of 68877569 is about 8299.2511107931. The cubic root of 68877569 is about 409.9138605474.

The spelling of 68877569 in words is "sixty-eight million, eight hundred seventy-seven thousand, five hundred sixty-nine".