90539543 has 2 divisors, whose sum is σ = 90539544. Its totient is φ = 90539542.

The previous prime is 90539507. The next prime is 90539549. The reversal of 90539543 is 34593509.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90539543 - 2⁸ = 90539287 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90539497 and 90539506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90539549) 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 as a sum of consecutive naturals, namely, 45269771 + 45269772.

It is an arithmetic number, because the mean of its divisors is an integer number (45269772).

Almost surely, 2^90539543 is an apocalyptic number.

90539543 is a deficient number, since it is larger than the sum of its proper divisors (1).

90539543 is an equidigital number, since it uses as much as digits as its factorization.

90539543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72900, while the sum is 38.

The square root of 90539543 is about 9515.2269021816. The cubic root of 90539543 is about 449.0342134930.

The spelling of 90539543 in words is "ninety million, five hundred thirty-nine thousand, five hundred forty-three".