8315491 has 4 divisors (see below), whose sum is σ = 8540272. Its totient is φ = 8090712.

The previous prime is 8315477. The next prime is 8315507. The reversal of 8315491 is 1945138.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8315491 - 2⁹ = 8314979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8315441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112335 + ... + 112408.

It is an arithmetic number, because the mean of its divisors is an integer number (2135068).

Almost surely, 2^8315491 is an apocalyptic number.

8315491 is a deficient number, since it is larger than the sum of its proper divisors (224781).

8315491 is a wasteful number, since it uses less digits than its factorization.

8315491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224780.

The product of its digits is 4320, while the sum is 31.

The square root of 8315491 is about 2883.6593071998. The cubic root of 8315491 is about 202.5952688949.

The spelling of 8315491 in words is "eight million, three hundred fifteen thousand, four hundred ninety-one".