68086987 has 2 divisors, whose sum is σ = 68086988. Its totient is φ = 68086986.

The previous prime is 68086981. The next prime is 68086999. The reversal of 68086987 is 78968086.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68086987 - 2³ = 68086979 is a prime.

It is not a weakly prime, because it can be changed into another prime (68086981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34043493 + 34043494.

It is an arithmetic number, because the mean of its divisors is an integer number (34043494).

Almost surely, 2^68086987 is an apocalyptic number.

68086987 is a deficient number, since it is larger than the sum of its proper divisors (1).

68086987 is an equidigital number, since it uses as much as digits as its factorization.

68086987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1161216, while the sum is 52.

The square root of 68086987 is about 8251.4839271491. The cubic root of 68086987 is about 408.3394806053.

The spelling of 68086987 in words is "sixty-eight million, eighty-six thousand, nine hundred eighty-seven".