1662973 has 4 divisors (see below), whose sum is σ = 1790908. Its totient is φ = 1535040.

The previous prime is 1662961. The next prime is 1662977. The reversal of 1662973 is 3792661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 636804 + 1026169 = 798^2 + 1013^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1662973 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 (1662977) 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, 63948 + ... + 63973.

It is an arithmetic number, because the mean of its divisors is an integer number (447727).

2^1662973 is an apocalyptic number.

1662973 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1662973 is a deficient number, since it is larger than the sum of its proper divisors (127935).

1662973 is a wasteful number, since it uses less digits than its factorization.

1662973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127934.

The product of its digits is 13608, while the sum is 34.

The square root of 1662973 is about 1289.5631043109. The cubic root of 1662973 is about 118.4754588452.

The spelling of 1662973 in words is "one million, six hundred sixty-two thousand, nine hundred seventy-three".