1997434 has 4 divisors (see below), whose sum is σ = 2996154. Its totient is φ = 998716.

The previous prime is 1997431. The next prime is 1997441. The reversal of 1997434 is 4347991.

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., 1974025 + 23409 = 1405^2 + 153^2 .

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 1997393 and 1997402.

It is not an unprimeable number, because it can be changed into a prime (1997431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499357 + ... + 499360.

2^1997434 is an apocalyptic number.

1997434 is a deficient number, since it is larger than the sum of its proper divisors (998720).

1997434 is an equidigital number, since it uses as much as digits as its factorization.

1997434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998719.

The product of its digits is 27216, while the sum is 37.

The square root of 1997434 is about 1413.3060531958. The cubic root of 1997434 is about 125.9381993057.

The spelling of 1997434 in words is "one million, nine hundred ninety-seven thousand, four hundred thirty-four".