2009797 has 4 divisors (see below), whose sum is σ = 2038176. Its totient is φ = 1981420.

The previous prime is 2009789. The next prime is 2009807. The reversal of 2009797 is 7979002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2009797 - 2³ = 2009789 is a prime.

It is a Duffinian number.

2009797 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2009737) 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, 14083 + ... + 14224.

It is an arithmetic number, because the mean of its divisors is an integer number (509544).

2^2009797 is an apocalyptic number.

It is an amenable number.

2009797 is a deficient number, since it is larger than the sum of its proper divisors (28379).

2009797 is an equidigital number, since it uses as much as digits as its factorization.

2009797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28378.

The product of its (nonzero) digits is 7938, while the sum is 34.

The square root of 2009797 is about 1417.6730934881. The cubic root of 2009797 is about 126.1974940962.

The spelling of 2009797 in words is "two million, nine thousand, seven hundred ninety-seven".