1982906 has 4 divisors (see below), whose sum is σ = 2974362. Its totient is φ = 991452.

The previous prime is 1982891. The next prime is 1982909. The reversal of 1982906 is 6092891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6092891 = 7 ⋅870413.

It can be written as a sum of positive squares in only one way, i.e., 1357225 + 625681 = 1165^2 + 791^2 .

It is not an unprimeable number, because it can be changed into a prime (1982909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495725 + ... + 495728.

2^1982906 is an apocalyptic number.

1982906 is a deficient number, since it is larger than the sum of its proper divisors (991456).

1982906 is an equidigital number, since it uses as much as digits as its factorization.

1982906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991455.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 1982906 is about 1408.1569514795. The cubic root of 1982906 is about 125.6321259458.

The spelling of 1982906 in words is "one million, nine hundred eighty-two thousand, nine hundred six".