168359987 has 2 divisors, whose sum is σ = 168359988. Its totient is φ = 168359986.

The previous prime is 168359951. The next prime is 168360011. The reversal of 168359987 is 789953861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 168359987 - 2¹⁴ = 168343603 is a prime.

It is not a weakly prime, because it can be changed into another prime (168359927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84179993 + 84179994.

It is an arithmetic number, because the mean of its divisors is an integer number (84179994).

Almost surely, 2^168359987 is an apocalyptic number.

168359987 is a deficient number, since it is larger than the sum of its proper divisors (1).

168359987 is an equidigital number, since it uses as much as digits as its factorization.

168359987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3265920, while the sum is 56.

The square root of 168359987 is about 12975.3607656974. The cubic root of 168359987 is about 552.1786719010.

The spelling of 168359987 in words is "one hundred sixty-eight million, three hundred fifty-nine thousand, nine hundred eighty-seven".