68862569 has 2 divisors, whose sum is σ = 68862570. Its totient is φ = 68862568.

The previous prime is 68862509. The next prime is 68862611. The reversal of 68862569 is 96526886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45697600 + 23164969 = 6760^2 + 4813^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68862569 is a prime.

It is a super-2 number, since 2×68862569² = 9484106818559522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68862509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34431284 + 34431285.

It is an arithmetic number, because the mean of its divisors is an integer number (34431285).

Almost surely, 2^68862569 is an apocalyptic number.

It is an amenable number.

68862569 is a deficient number, since it is larger than the sum of its proper divisors (1).

68862569 is an equidigital number, since it uses as much as digits as its factorization.

68862569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1244160, while the sum is 50.

The square root of 68862569 is about 8298.3473655903. The cubic root of 68862569 is about 409.8841016849.

The spelling of 68862569 in words is "sixty-eight million, eight hundred sixty-two thousand, five hundred sixty-nine".