997950 has 24 divisors (see below), whose sum is σ = 2475288. Its totient is φ = 266080.

The previous prime is 997949. The next prime is 997961. The reversal of 997950 is 59799.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 997899 and 997908.

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 997950.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3177 + ... + 3476.

It is an arithmetic number, because the mean of its divisors is an integer number (103137).

2⁹⁹⁷⁹⁵⁰ is an apocalyptic number.

997950 is an abundant number, since it is smaller than the sum of its proper divisors (1477338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

997950 is a wasteful number, since it uses less digits than its factorization.

997950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6668 (or 6663 counting only the distinct ones).

The product of its (nonzero) digits is 25515, while the sum is 39.

The square root of 997950 is about 998.9744741484. The cubic root of 997950 is about 99.9316199190.

The spelling of 997950 in words is "nine hundred ninety-seven thousand, nine hundred fifty".