83809543 has 2 divisors, whose sum is σ = 83809544. Its totient is φ = 83809542.

The previous prime is 83809519. The next prime is 83809549. The reversal of 83809543 is 34590838.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 83809543 - 2⁵ = 83809511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 83809496 and 83809505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83809549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41904771 + 41904772.

It is an arithmetic number, because the mean of its divisors is an integer number (41904772).

Almost surely, 2^83809543 is an apocalyptic number.

83809543 is a deficient number, since it is larger than the sum of its proper divisors (1).

83809543 is an equidigital number, since it uses as much as digits as its factorization.

83809543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 83809543 is about 9154.7552124565. The cubic root of 83809543 is about 437.6206674502.

The spelling of 83809543 in words is "eighty-three million, eight hundred nine thousand, five hundred forty-three".