1997697 has 16 divisors (see below), whose sum is σ = 2894528. Its totient is φ = 1218240.

The previous prime is 1997693. The next prime is 1997701. The reversal of 1997697 is 7967991.

It is an interprime number because it is at equal distance from previous prime (1997693) and next prime (1997701).

It is not a de Polignac number, because 1997697 - 2² = 1997693 is a prime.

It is a plaindrome in base 11.

It is a zygodrome in base 11.

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 15 ways as a sum of consecutive naturals, for example, 6918 + ... + 7200.

It is an arithmetic number, because the mean of its divisors is an integer number (180908).

2^1997697 is an apocalyptic number.

It is an amenable number.

1997697 is a deficient number, since it is larger than the sum of its proper divisors (896831).

1997697 is a wasteful number, since it uses less digits than its factorization.

1997697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480.

The product of its digits is 214326, while the sum is 48.

The square root of 1997697 is about 1413.3990943821. The cubic root of 1997697 is about 125.9437264458.

The spelling of 1997697 in words is "one million, nine hundred ninety-seven thousand, six hundred ninety-seven".