1984997 has 4 divisors (see below), whose sum is σ = 2268576. Its totient is φ = 1701420.

The previous prime is 1984991. The next prime is 1985003. The reversal of 1984997 is 7994891.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7994891 = 53 ⋅150847.

It is an interprime number because it is at equal distance from previous prime (1984991) and next prime (1985003).

It is not a de Polignac number, because 1984997 - 2⁴ = 1984981 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 (1984991) 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, 141779 + ... + 141792.

It is an arithmetic number, because the mean of its divisors is an integer number (567144).

2^1984997 is an apocalyptic number.

It is an amenable number.

1984997 is a deficient number, since it is larger than the sum of its proper divisors (283579).

1984997 is an equidigital number, since it uses as much as digits as its factorization.

1984997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283578.

The product of its digits is 163296, while the sum is 47.

The square root of 1984997 is about 1408.8992157000. The cubic root of 1984997 is about 125.6762706658.

The spelling of 1984997 in words is "one million, nine hundred eighty-four thousand, nine hundred ninety-seven".