8972491 has 4 divisors (see below), whose sum is σ = 9788184. Its totient is φ = 8156800.

The previous prime is 8972489. The next prime is 8972501. The reversal of 8972491 is 1942798.

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 8972491 - 2¹ = 8972489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8972191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 407830 + ... + 407851.

It is an arithmetic number, because the mean of its divisors is an integer number (2447046).

Almost surely, 2^8972491 is an apocalyptic number.

8972491 is a deficient number, since it is larger than the sum of its proper divisors (815693).

8972491 is a wasteful number, since it uses less digits than its factorization.

8972491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815692.

The product of its digits is 36288, while the sum is 40.

The square root of 8972491 is about 2995.4116578527. The cubic root of 8972491 is about 207.7962362873.

The spelling of 8972491 in words is "eight million, nine hundred seventy-two thousand, four hundred ninety-one".