83549661 has 8 divisors (see below), whose sum is σ = 119968800. Its totient is φ = 51415152.

The previous prime is 83549657. The next prime is 83549693. The reversal of 83549661 is 16694538.

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

It is not a de Polignac number, because 83549661 - 2² = 83549657 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83549621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1071111 + ... + 1071188.

It is an arithmetic number, because the mean of its divisors is an integer number (14996100).

Almost surely, 2^83549661 is an apocalyptic number.

It is an amenable number.

83549661 is a deficient number, since it is larger than the sum of its proper divisors (36419139).

83549661 is a wasteful number, since it uses less digits than its factorization.

83549661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2142315.

The product of its digits is 155520, while the sum is 42.

The square root of 83549661 is about 9140.5503663620. The cubic root of 83549661 is about 437.1678650340.

The spelling of 83549661 in words is "eighty-three million, five hundred forty-nine thousand, six hundred sixty-one".