83909533 has 2 divisors, whose sum is σ = 83909534. Its totient is φ = 83909532.

The previous prime is 83909513. The next prime is 83909549. The reversal of 83909533 is 33590938.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53846244 + 30063289 = 7338^2 + 5483^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83909533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83909503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41954766 + 41954767.

It is an arithmetic number, because the mean of its divisors is an integer number (41954767).

Almost surely, 2^83909533 is an apocalyptic number.

It is an amenable number.

83909533 is a deficient number, since it is larger than the sum of its proper divisors (1).

83909533 is an equidigital number, since it uses as much as digits as its factorization.

83909533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 40.

The square root of 83909533 is about 9160.2146808904. The cubic root of 83909533 is about 437.7946345133.

The spelling of 83909533 in words is "eighty-three million, nine hundred nine thousand, five hundred thirty-three".