1617982 has 4 divisors (see below), whose sum is σ = 2426976. Its totient is φ = 808990.

The previous prime is 1617977. The next prime is 1617989. The reversal of 1617982 is 2897161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2897161 = 257 ⋅11273.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1617989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404494 + ... + 404497.

It is an arithmetic number, because the mean of its divisors is an integer number (606744).

2^1617982 is an apocalyptic number.

1617982 is a deficient number, since it is larger than the sum of its proper divisors (808994).

1617982 is an equidigital number, since it uses as much as digits as its factorization.

1617982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808993.

The product of its digits is 6048, while the sum is 34.

The square root of 1617982 is about 1271.9992138362. Note that the first 3 decimals coincide. The cubic root of 1617982 is about 117.3972422873.

It can be divided in two parts, 16179 and 82, that added together give a palindrome (16261).

The spelling of 1617982 in words is "one million, six hundred seventeen thousand, nine hundred eighty-two".