1997922 has 8 divisors (see below), whose sum is σ = 3995856. Its totient is φ = 665972.

The previous prime is 1997921. The next prime is 1997939. The reversal of 1997922 is 2297991.

It is a happy number.

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

1997922 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1997921) 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, 166488 + ... + 166499.

It is an arithmetic number, because the mean of its divisors is an integer number (499482).

2^1997922 is an apocalyptic number.

1997922 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1997922 is a wasteful number, since it uses less digits than its factorization.

1997922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332992.

The product of its digits is 20412, while the sum is 39.

The square root of 1997922 is about 1413.4786874941. The cubic root of 1997922 is about 125.9484546027.

The spelling of 1997922 in words is "one million, nine hundred ninety-seven thousand, nine hundred twenty-two".