68597987 has 2 divisors, whose sum is σ = 68597988. Its totient is φ = 68597986.

The previous prime is 68597909. The next prime is 68597989. The reversal of 68597987 is 78979586.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68597987 - 2¹⁰ = 68596963 is a prime.

Together with 68597989, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68597989) 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, 34298993 + 34298994.

It is an arithmetic number, because the mean of its divisors is an integer number (34298994).

Almost surely, 2^68597987 is an apocalyptic number.

68597987 is a deficient number, since it is larger than the sum of its proper divisors (1).

68597987 is an equidigital number, since it uses as much as digits as its factorization.

68597987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7620480, while the sum is 59.

The square root of 68597987 is about 8282.3901743398. The cubic root of 68597987 is about 409.3584791965.

The spelling of 68597987 in words is "sixty-eight million, five hundred ninety-seven thousand, nine hundred eighty-seven".