997623 has 16 divisors (see below), whose sum is σ = 1612800. Its totient is φ = 604440.

The previous prime is 997609. The next prime is 997627. The reversal of 997623 is 326799.

It is not a de Polignac number, because 997623 - 2⁹ = 997111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1383 + ... + 1976.

It is an arithmetic number, because the mean of its divisors is an integer number (100800).

2⁹⁹⁷⁶²³ is an apocalyptic number.

997623 is a deficient number, since it is larger than the sum of its proper divisors (615177).

997623 is a wasteful number, since it uses less digits than its factorization.

997623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3379 (or 3373 counting only the distinct ones).

The product of its digits is 20412, while the sum is 36.

The square root of 997623 is about 998.8107928932. The cubic root of 997623 is about 99.9207038044.

It can be divided in two parts, 9976 and 23, that added together give a palindrome (9999).

The spelling of 997623 in words is "nine hundred ninety-seven thousand, six hundred twenty-three".