83505823 has 2 divisors, whose sum is σ = 83505824. Its totient is φ = 83505822.

The previous prime is 83505797. The next prime is 83505833. The reversal of 83505823 is 32850538.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83505823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83505833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41752911 + 41752912.

It is an arithmetic number, because the mean of its divisors is an integer number (41752912).

Almost surely, 2^83505823 is an apocalyptic number.

83505823 is a deficient number, since it is larger than the sum of its proper divisors (1).

83505823 is an equidigital number, since it uses as much as digits as its factorization.

83505823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 83505823 is about 9138.1520560779. The cubic root of 83505823 is about 437.0913918823.

The spelling of 83505823 in words is "eighty-three million, five hundred five thousand, eight hundred twenty-three".