83533609 has 4 divisors (see below), whose sum is σ = 83552980. Its totient is φ = 83514240.

The previous prime is 83533603. The next prime is 83533613. The reversal of 83533609 is 90633538.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90633538 = 2 ⋅45316769.

It can be written as a sum of positive squares in 2 ways, for example, as 69305625 + 14227984 = 8325^2 + 3772^2 .

It is a cyclic number.

It is not a de Polignac number, because 83533609 - 2¹³ = 83525417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83533603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37 + ... + 12925.

It is an arithmetic number, because the mean of its divisors is an integer number (20888245).

Almost surely, 2^83533609 is an apocalyptic number.

It is an amenable number.

83533609 is a deficient number, since it is larger than the sum of its proper divisors (19371).

83533609 is a wasteful number, since it uses less digits than its factorization.

83533609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19370.

The product of its (nonzero) digits is 58320, while the sum is 37.

The square root of 83533609 is about 9139.6722588942. The cubic root of 83533609 is about 437.1398662449.

The spelling of 83533609 in words is "eighty-three million, five hundred thirty-three thousand, six hundred nine".