997922 has 4 divisors (see below), whose sum is σ = 1496886. Its totient is φ = 498960.

The previous prime is 997897. The next prime is 997933. The reversal of 997922 is 229799.

997922 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 561001 + 436921 = 749^2 + 661^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249479 + ... + 249482.

2⁹⁹⁷⁹²² is an apocalyptic number.

997922 is a deficient number, since it is larger than the sum of its proper divisors (498964).

997922 is a wasteful number, since it uses less digits than its factorization.

997922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498963.

The product of its digits is 20412, while the sum is 38.

The square root of 997922 is about 998.9604596780. The cubic root of 997922 is about 99.9306852992.

It can be divided in two parts, 9979 and 22, that added together give a palindrome (10001).

The spelling of 997922 in words is "nine hundred ninety-seven thousand, nine hundred twenty-two".