2019997 has 4 divisors (see below), whose sum is σ = 2308576. Its totient is φ = 1731420.

The previous prime is 2019977. The next prime is 2020001. The reversal of 2019997 is 7999102.

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 2019997 - 2⁷ = 2019869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2019907) 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, 144279 + ... + 144292.

It is an arithmetic number, because the mean of its divisors is an integer number (577144).

2^2019997 is an apocalyptic number.

It is an amenable number.

2019997 is a deficient number, since it is larger than the sum of its proper divisors (288579).

2019997 is an equidigital number, since it uses as much as digits as its factorization.

2019997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288578.

The product of its (nonzero) digits is 10206, while the sum is 37.

The square root of 2019997 is about 1421.2659849585. The cubic root of 2019997 is about 126.4106239067.

The spelling of 2019997 in words is "two million, nineteen thousand, nine hundred ninety-seven".