1997011 has 4 divisors (see below), whose sum is σ = 2002000. Its totient is φ = 1992024.

The previous prime is 1997003. The next prime is 1997029. The reversal of 1997011 is 1107991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1107991 = 191 ⋅5801.

It is a cyclic number.

It is not a de Polignac number, because 1997011 - 2³ = 1997003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1997081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1836 + ... + 2713.

It is an arithmetic number, because the mean of its divisors is an integer number (500500).

2^1997011 is an apocalyptic number.

1997011 is a deficient number, since it is larger than the sum of its proper divisors (4989).

1997011 is an equidigital number, since it uses as much as digits as its factorization.

1997011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4988.

The product of its (nonzero) digits is 567, while the sum is 28.

The square root of 1997011 is about 1413.1563961572. The cubic root of 1997011 is about 125.9293086291.

The spelling of 1997011 in words is "one million, nine hundred ninety-seven thousand, eleven".