68913287 has 2 divisors, whose sum is σ = 68913288. Its totient is φ = 68913286.

The previous prime is 68913253. The next prime is 68913301. The reversal of 68913287 is 78231986.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68913287 is a prime.

It is a super-2 number, since 2×68913287² = 9498082250288738, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68913487) 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, 34456643 + 34456644.

It is an arithmetic number, because the mean of its divisors is an integer number (34456644).

Almost surely, 2^68913287 is an apocalyptic number.

68913287 is a deficient number, since it is larger than the sum of its proper divisors (1).

68913287 is an equidigital number, since it uses as much as digits as its factorization.

68913287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 44.

The square root of 68913287 is about 8301.4027127950. The cubic root of 68913287 is about 409.9847049618.

The spelling of 68913287 in words is "sixty-eight million, nine hundred thirteen thousand, two hundred eighty-seven".