8187997 has 8 divisors (see below), whose sum is σ = 8316000. Its totient is φ = 8061264.

The previous prime is 8187983. The next prime is 8188001. The reversal of 8187997 is 7997818.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8187997 - 2¹⁵ = 8155229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8187997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8187097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26518 + ... + 26824.

It is an arithmetic number, because the mean of its divisors is an integer number (1039500).

Almost surely, 2^8187997 is an apocalyptic number.

It is an amenable number.

8187997 is a deficient number, since it is larger than the sum of its proper divisors (128003).

8187997 is a wasteful number, since it uses less digits than its factorization.

8187997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635.

The product of its digits is 254016, while the sum is 49.

The square root of 8187997 is about 2861.4676304302. The cubic root of 8187997 is about 201.5545275816.

The spelling of 8187997 in words is "eight million, one hundred eighty-seven thousand, nine hundred ninety-seven".