997487 has 8 divisors (see below), whose sum is σ = 1075200. Its totient is φ = 922680.

The previous prime is 997463. The next prime is 997511. The reversal of 997487 is 784799.

It is an interprime number because it is at equal distance from previous prime (997463) and next prime (997511).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-997487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14 + ... + 1412.

It is an arithmetic number, because the mean of its divisors is an integer number (134400).

2⁹⁹⁷⁴⁸⁷ is an apocalyptic number.

997487 is a deficient number, since it is larger than the sum of its proper divisors (77713).

997487 is a wasteful number, since it uses less digits than its factorization.

997487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1453.

The product of its digits is 127008, while the sum is 44.

The square root of 997487 is about 998.7427096104. The cubic root of 997487 is about 99.9161630667.

The spelling of 997487 in words is "nine hundred ninety-seven thousand, four hundred eighty-seven".