997953 has 8 divisors (see below), whose sum is σ = 1451616. Its totient is φ = 604800.

The previous prime is 997949. The next prime is 997961. The reversal of 997953 is 359799.

It is a happy number.

997953 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 997953 - 2² = 997949 is a prime.

It is not an unprimeable number, because it can be changed into a prime (997933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15088 + ... + 15153.

It is an arithmetic number, because the mean of its divisors is an integer number (181452).

2⁹⁹⁷⁹⁵³ is an apocalyptic number.

It is an amenable number.

997953 is a deficient number, since it is larger than the sum of its proper divisors (453663).

997953 is a wasteful number, since it uses less digits than its factorization.

997953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30255.

The product of its digits is 76545, while the sum is 42.

The square root of 997953 is about 998.9759756871. The cubic root of 997953 is about 99.9317200558.

The spelling of 997953 in words is "nine hundred ninety-seven thousand, nine hundred fifty-three".