83643523 has 4 divisors (see below), whose sum is σ = 83687128. Its totient is φ = 83599920.

The previous prime is 83643517. The next prime is 83643559. The reversal of 83643523 is 32534638.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83643523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83643583) 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 3 ways as a sum of consecutive naturals, for example, 18786 + ... + 22807.

It is an arithmetic number, because the mean of its divisors is an integer number (20921782).

Almost surely, 2^83643523 is an apocalyptic number.

83643523 is a deficient number, since it is larger than the sum of its proper divisors (43605).

83643523 is a wasteful number, since it uses less digits than its factorization.

83643523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43604.

The product of its digits is 51840, while the sum is 34.

The square root of 83643523 is about 9145.6832986934. The cubic root of 83643523 is about 437.3315125908.

The spelling of 83643523 in words is "eighty-three million, six hundred forty-three thousand, five hundred twenty-three".