4217987 has 2 divisors, whose sum is σ = 4217988. Its totient is φ = 4217986.

The previous prime is 4217971. The next prime is 4218001. The reversal of 4217987 is 7897124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4217987 - 2⁴ = 4217971 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 4217987.

It is not a weakly prime, because it can be changed into another prime (4217287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2108993 + 2108994.

It is an arithmetic number, because the mean of its divisors is an integer number (2108994).

Almost surely, 2^4217987 is an apocalyptic number.

4217987 is a deficient number, since it is larger than the sum of its proper divisors (1).

4217987 is an equidigital number, since it uses as much as digits as its factorization.

4217987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 38.

The square root of 4217987 is about 2053.7738434404. The cubic root of 4217987 is about 161.5728599285.

The spelling of 4217987 in words is "four million, two hundred seventeen thousand, nine hundred eighty-seven".