82983561 has 4 divisors (see below), whose sum is σ = 110644752. Its totient is φ = 55322372.

The previous prime is 82983547. The next prime is 82983569. The reversal of 82983561 is 16538928.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82983561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82983569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13830591 + ... + 13830596.

It is an arithmetic number, because the mean of its divisors is an integer number (27661188).

Almost surely, 2^82983561 is an apocalyptic number.

It is an amenable number.

82983561 is a deficient number, since it is larger than the sum of its proper divisors (27661191).

82983561 is a wasteful number, since it uses less digits than its factorization.

82983561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27661190.

The product of its digits is 103680, while the sum is 42.

The square root of 82983561 is about 9109.5313271320. The cubic root of 82983561 is about 436.1782668184.

The spelling of 82983561 in words is "eighty-two million, nine hundred eighty-three thousand, five hundred sixty-one".