168983987 has 2 divisors, whose sum is σ = 168983988. Its totient is φ = 168983986.

The previous prime is 168983951. The next prime is 168984019. The reversal of 168983987 is 789389861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 168983987 - 2¹² = 168979891 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (168983687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84491993 + 84491994.

It is an arithmetic number, because the mean of its divisors is an integer number (84491994).

Almost surely, 2^168983987 is an apocalyptic number.

168983987 is a deficient number, since it is larger than the sum of its proper divisors (1).

168983987 is an equidigital number, since it uses as much as digits as its factorization.

168983987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5225472, while the sum is 59.

The square root of 168983987 is about 12999.3841007949. The cubic root of 168983987 is about 552.8600188299.

The spelling of 168983987 in words is "one hundred sixty-eight million, nine hundred eighty-three thousand, nine hundred eighty-seven".