82742439 has 8 divisors (see below), whose sum is σ = 118809712. Its totient is φ = 50918400.

The previous prime is 82742437. The next prime is 82742447. The reversal of 82742439 is 93424728.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 82742439 - 2¹ = 82742437 is a prime.

It is a super-2 number, since 2×82742439² = 13692622423337442, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 2121601 = 82742439 / (8 + 2 + 7 + 4 + 2 + 4 + 3 + 9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82742397 and 82742406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82742437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1060762 + ... + 1060839.

It is an arithmetic number, because the mean of its divisors is an integer number (14851214).

Almost surely, 2^82742439 is an apocalyptic number.

82742439 is a deficient number, since it is larger than the sum of its proper divisors (36067273).

82742439 is a wasteful number, since it uses less digits than its factorization.

82742439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2121617.

The product of its digits is 96768, while the sum is 39.

The square root of 82742439 is about 9096.2870996907. The cubic root of 82742439 is about 435.7553950898.

The spelling of 82742439 in words is "eighty-two million, seven hundred forty-two thousand, four hundred thirty-nine".