1662797 has 4 divisors (see below), whose sum is σ = 1691040. Its totient is φ = 1634556.

The previous prime is 1662781. The next prime is 1662803. The reversal of 1662797 is 7972661.

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: 7972661 = 71 ⋅112291.

It is a cyclic number.

It is not a de Polignac number, because 1662797 - 2⁴ = 1662781 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1662797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1662707) 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, 14033 + ... + 14150.

It is an arithmetic number, because the mean of its divisors is an integer number (422760).

2^1662797 is an apocalyptic number.

It is an amenable number.

1662797 is a deficient number, since it is larger than the sum of its proper divisors (28243).

1662797 is an equidigital number, since it uses as much as digits as its factorization.

1662797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28242.

The product of its digits is 31752, while the sum is 38.

The square root of 1662797 is about 1289.4948623395. The cubic root of 1662797 is about 118.4712790988.

The spelling of 1662797 in words is "one million, six hundred sixty-two thousand, seven hundred ninety-seven".