83538561 has 8 divisors (see below), whose sum is σ = 117936864. Its totient is φ = 52416320.

The previous prime is 83538557. The next prime is 83538571. The reversal of 83538561 is 16583538.

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

It is a cyclic number.

It is not a de Polignac number, because 83538561 - 2² = 83538557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83538541) 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 7 ways as a sum of consecutive naturals, for example, 818955 + ... + 819056.

It is an arithmetic number, because the mean of its divisors is an integer number (14742108).

Almost surely, 2^83538561 is an apocalyptic number.

It is an amenable number.

83538561 is a deficient number, since it is larger than the sum of its proper divisors (34398303).

83538561 is a wasteful number, since it uses less digits than its factorization.

83538561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1638031.

The product of its digits is 86400, while the sum is 39.

The square root of 83538561 is about 9139.9431617489. The cubic root of 83538561 is about 437.1485041806.

The spelling of 83538561 in words is "eighty-three million, five hundred thirty-eight thousand, five hundred sixty-one".