8197491 has 4 divisors (see below), whose sum is σ = 10929992. Its totient is φ = 5464992.

The previous prime is 8197489. The next prime is 8197507. The reversal of 8197491 is 1947918.

It is a happy number.

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

It is not a de Polignac number, because 8197491 - 2¹ = 8197489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8197471) 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, 1366246 + ... + 1366251.

It is an arithmetic number, because the mean of its divisors is an integer number (2732498).

Almost surely, 2^8197491 is an apocalyptic number.

8197491 is a deficient number, since it is larger than the sum of its proper divisors (2732501).

8197491 is a wasteful number, since it uses less digits than its factorization.

8197491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2732500.

The product of its digits is 18144, while the sum is 39.

The square root of 8197491 is about 2863.1260887359. The cubic root of 8197491 is about 201.6323984606.

The spelling of 8197491 in words is "eight million, one hundred ninety-seven thousand, four hundred ninety-one".