997755 has 16 divisors (see below), whose sum is σ = 1741824. Its totient is φ = 483680.

The previous prime is 997751. The next prime is 997769. The reversal of 997755 is 557799.

It is a happy number.

It is not a de Polignac number, because 997755 - 2² = 997751 is a prime.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (997751) 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, 2859 + ... + 3188.

It is an arithmetic number, because the mean of its divisors is an integer number (108864).

2⁹⁹⁷⁷⁵⁵ is an apocalyptic number.

997755 is a deficient number, since it is larger than the sum of its proper divisors (744069).

997755 is a wasteful number, since it uses less digits than its factorization.

997755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6066.

The product of its digits is 99225, while the sum is 42.

The square root of 997755 is about 998.8768692887. The cubic root of 997755 is about 99.9251105964.

The spelling of 997755 in words is "nine hundred ninety-seven thousand, seven hundred fifty-five".