1997694 has 48 divisors (see below), whose sum is σ = 4633200. Its totient is φ = 620928.

The previous prime is 1997693. The next prime is 1997701. The reversal of 1997694 is 4967991.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997693) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22402 + ... + 22490.

It is an arithmetic number, because the mean of its divisors is an integer number (96525).

2^1997694 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1997694, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2316600).

1997694 is an abundant number, since it is smaller than the sum of its proper divisors (2635506).

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

1997694 is a wasteful number, since it uses less digits than its factorization.

1997694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169 (or 166 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 1997694 is about 1413.3980331103. The cubic root of 1997694 is about 125.9436634013.

The spelling of 1997694 in words is "one million, nine hundred ninety-seven thousand, six hundred ninety-four".