1972839 has 16 divisors (see below), whose sum is σ = 2893824. Its totient is φ = 1185600.

The previous prime is 1972829. The next prime is 1972847. The reversal of 1972839 is 9382791.

1972839 is nontrivially palindromic in base 8.

It is not a de Polignac number, because 1972839 - 2⁴ = 1972823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1972797 and 1972806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1972829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6147 + ... + 6459.

It is an arithmetic number, because the mean of its divisors is an integer number (180864).

2^1972839 is an apocalyptic number.

1972839 is a deficient number, since it is larger than the sum of its proper divisors (920985).

1972839 is a wasteful number, since it uses less digits than its factorization.

1972839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518.

The product of its digits is 27216, while the sum is 39.

The square root of 1972839 is about 1404.5778725297. The cubic root of 1972839 is about 125.4191582134.

The spelling of 1972839 in words is "one million, nine hundred seventy-two thousand, eight hundred thirty-nine".