1982431 has 4 divisors (see below), whose sum is σ = 2162664. Its totient is φ = 1802200.

The previous prime is 1982417. The next prime is 1982437. The reversal of 1982431 is 1342891.

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: 1342891 = 11 ⋅122081.

It is a cyclic number.

It is not a de Polignac number, because 1982431 - 2⁹ = 1981919 is a prime.

It is a super-2 number, since 2×1982431² = 7860065339522, which contains 22 as substring.

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 1982431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1982437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90100 + ... + 90121.

It is an arithmetic number, because the mean of its divisors is an integer number (540666).

2^1982431 is an apocalyptic number.

1982431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1982431 is a deficient number, since it is larger than the sum of its proper divisors (180233).

1982431 is a wasteful number, since it uses less digits than its factorization.

1982431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180232.

The product of its digits is 1728, while the sum is 28.

The square root of 1982431 is about 1407.9882812012. The cubic root of 1982431 is about 125.6220935278.

The spelling of 1982431 in words is "one million, nine hundred eighty-two thousand, four hundred thirty-one".