997582 has 4 divisors (see below), whose sum is σ = 1496376. Its totient is φ = 498790.

The previous prime is 997573. The next prime is 997583. The reversal of 997582 is 285799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 285799 = 181 ⋅1579.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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

997582 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249394 + ... + 249397.

It is an arithmetic number, because the mean of its divisors is an integer number (374094).

2⁹⁹⁷⁵⁸² is an apocalyptic number.

997582 is a deficient number, since it is larger than the sum of its proper divisors (498794).

997582 is a wasteful number, since it uses less digits than its factorization.

997582 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498793.

The product of its digits is 45360, while the sum is 40.

The square root of 997582 is about 998.7902682746. The cubic root of 997582 is about 99.9193349490.

The spelling of 997582 in words is "nine hundred ninety-seven thousand, five hundred eighty-two".