997237 has 4 divisors (see below), whose sum is σ = 1055916. Its totient is φ = 938560.

The previous prime is 997219. The next prime is 997247. The reversal of 997237 is 732799.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 398161 + 599076 = 631^2 + 774^2 .

It is a cyclic number.

It is not a de Polignac number, because 997237 - 2⁷ = 997109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 997196 and 997205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29314 + ... + 29347.

It is an arithmetic number, because the mean of its divisors is an integer number (263979).

2⁹⁹⁷²³⁷ is an apocalyptic number.

It is an amenable number.

997237 is a deficient number, since it is larger than the sum of its proper divisors (58679).

997237 is a wasteful number, since it uses less digits than its factorization.

997237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58678.

The product of its digits is 23814, while the sum is 37.

The square root of 997237 is about 998.6175444083. The cubic root of 997237 is about 99.9078150455.

The spelling of 997237 in words is "nine hundred ninety-seven thousand, two hundred thirty-seven".