997375 has 16 divisors (see below), whose sum is σ = 1272960. Its totient is φ = 780000.

The previous prime is 997369. The next prime is 997379. The reversal of 997375 is 573799.

997375 = 45² + 46² + ... + 145².

It is not a de Polignac number, because 997375 - 2⁵ = 997343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9825 + ... + 9925.

It is an arithmetic number, because the mean of its divisors is an integer number (79560).

997375 is a Friedman number, since it can be written as 7979*5^3, using all its digits and the basic arithmetic operations.

2⁹⁹⁷³⁷⁵ is an apocalyptic number.

997375 is a deficient number, since it is larger than the sum of its proper divisors (275585).

997375 is a wasteful number, since it uses less digits than its factorization.

997375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195 (or 185 counting only the distinct ones).

The product of its digits is 59535, while the sum is 40.

The square root of 997375 is about 998.6866375395. The cubic root of 997375 is about 99.9124233257.

The spelling of 997375 in words is "nine hundred ninety-seven thousand, three hundred seventy-five".