82419409 has 4 divisors (see below), whose sum is σ = 83548516. Its totient is φ = 81290304.

The previous prime is 82419391. The next prime is 82419431. The reversal of 82419409 is 90491428.

It is a happy number.

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 56205009 + 26214400 = 7497^2 + 5120^2 .

It is a cyclic number.

It is not a de Polignac number, because 82419409 - 2⁵ = 82419377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82419109) 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, 564444 + ... + 564589.

It is an arithmetic number, because the mean of its divisors is an integer number (20887129).

Almost surely, 2^82419409 is an apocalyptic number.

It is an amenable number.

82419409 is a deficient number, since it is larger than the sum of its proper divisors (1129107).

82419409 is a wasteful number, since it uses less digits than its factorization.

82419409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129106.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 82419409 is about 9078.5135897899. The cubic root of 82419409 is about 435.1875863341.

It can be divided in two parts, 82419 and 409, that added together give a palindrome (82828).

The spelling of 82419409 in words is "eighty-two million, four hundred nineteen thousand, four hundred nine".