8991315 has 12 divisors (see below), whose sum is σ = 15585024. Its totient is φ = 4795344.

The previous prime is 8991299. The next prime is 8991319. The reversal of 8991315 is 5131998.

It is a happy number.

It is not a de Polignac number, because 8991315 - 2⁴ = 8991299 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8991315.

It is not an unprimeable number, because it can be changed into a prime (8991319) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99859 + ... + 99948.

It is an arithmetic number, because the mean of its divisors is an integer number (1298752).

Almost surely, 2^8991315 is an apocalyptic number.

8991315 is a deficient number, since it is larger than the sum of its proper divisors (6593709).

8991315 is a wasteful number, since it uses less digits than its factorization.

8991315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199818 (or 199815 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 8991315 is about 2998.5521506220. The cubic root of 8991315 is about 207.9414514082.

The spelling of 8991315 in words is "eight million, nine hundred ninety-one thousand, three hundred fifteen".