82783509 has 16 divisors (see below), whose sum is σ = 117355392. Its totient is φ = 51791168.

The previous prime is 82783451. The next prime is 82783511. The reversal of 82783509 is 90538728.

It is a cyclic number.

It is not a de Polignac number, because 82783509 - 2⁷ = 82783381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82783559) 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, 7662 + ... + 14975.

It is an arithmetic number, because the mean of its divisors is an integer number (7334712).

Almost surely, 2^82783509 is an apocalyptic number.

It is an amenable number.

82783509 is a deficient number, since it is larger than the sum of its proper divisors (34571883).

82783509 is a wasteful number, since it uses less digits than its factorization.

82783509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22716.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 82783509 is about 9098.5443341229. The cubic root of 82783509 is about 435.8274802820.

The spelling of 82783509 in words is "eighty-two million, seven hundred eighty-three thousand, five hundred nine".