8997431 has 4 divisors (see below), whose sum is σ = 9471000. Its totient is φ = 8523864.

The previous prime is 8997427. The next prime is 8997451. The reversal of 8997431 is 1347998.

It is a happy number.

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 8997431 - 2² = 8997427 is a prime.

It is a super-2 number, since 2×8997431² = 161907529199522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8997421) 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, 236756 + ... + 236793.

It is an arithmetic number, because the mean of its divisors is an integer number (2367750).

Almost surely, 2^8997431 is an apocalyptic number.

8997431 is a deficient number, since it is larger than the sum of its proper divisors (473569).

8997431 is a wasteful number, since it uses less digits than its factorization.

8997431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473568.

The product of its digits is 54432, while the sum is 41.

The square root of 8997431 is about 2999.5718027745. The cubic root of 8997431 is about 207.9885888094.

The spelling of 8997431 in words is "eight million, nine hundred ninety-seven thousand, four hundred thirty-one".