82744839 has 12 divisors (see below), whose sum is σ = 122751096. Its totient is φ = 53672112.

The previous prime is 82744817. The next prime is 82744841. The reversal of 82744839 is 93844728.

It is not a de Polignac number, because 82744839 - 2⁵ = 82744807 is a prime.

It is a super-2 number, since 2×82744839² = 13693416762271842, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 82744794 and 82744803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82744139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 123909 + ... + 124574.

It is an arithmetic number, because the mean of its divisors is an integer number (10229258).

Almost surely, 2^82744839 is an apocalyptic number.

82744839 is a deficient number, since it is larger than the sum of its proper divisors (40006257).

82744839 is a wasteful number, since it uses less digits than its factorization.

82744839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248526 (or 248523 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 82744839 is about 9096.4190206916. The cubic root of 82744839 is about 435.7596081750.

The spelling of 82744839 in words is "eighty-two million, seven hundred forty-four thousand, eight hundred thirty-nine".