997389 has 6 divisors (see below), whose sum is σ = 1440686. Its totient is φ = 664920.

The previous prime is 997379. The next prime is 997391. The reversal of 997389 is 983799.

It is a happy number.

997389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 585225 + 412164 = 765^2 + 642^2 .

It is not a de Polignac number, because 997389 - 2⁵ = 997357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 997389.

It is not an unprimeable number, because it can be changed into a prime (997309) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55402 + ... + 55419.

2⁹⁹⁷³⁸⁹ is an apocalyptic number.

It is an amenable number.

997389 is a deficient number, since it is larger than the sum of its proper divisors (443297).

997389 is a wasteful number, since it uses less digits than its factorization.

997389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110827 (or 110824 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 997389 is about 998.6936467206. The cubic root of 997389 is about 99.9128908086.

The spelling of 997389 in words is "nine hundred ninety-seven thousand, three hundred eighty-nine".