997587 has 12 divisors (see below), whose sum is σ = 1450800. Its totient is φ = 660528.

The previous prime is 997583. The next prime is 997589. The reversal of 997587 is 785799.

It is not a de Polignac number, because 997587 - 2² = 997583 is a prime.

It is not an unprimeable number, because it can be changed into a prime (997583) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1513 + ... + 2069.

It is an arithmetic number, because the mean of its divisors is an integer number (120900).

2⁹⁹⁷⁵⁸⁷ is an apocalyptic number.

997587 is a deficient number, since it is larger than the sum of its proper divisors (453213).

997587 is a wasteful number, since it uses less digits than its factorization.

997587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762 (or 759 counting only the distinct ones).

The product of its digits is 158760, while the sum is 45.

The square root of 997587 is about 998.7927712994. The cubic root of 997587 is about 99.9195018846.

The spelling of 997587 in words is "nine hundred ninety-seven thousand, five hundred eighty-seven".