90544543 has 2 divisors, whose sum is σ = 90544544. Its totient is φ = 90544542.

The previous prime is 90544477. The next prime is 90544547. The reversal of 90544543 is 34544509.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90544543 - 2¹³ = 90536351 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90544499 and 90544508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90544547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45272271 + 45272272.

It is an arithmetic number, because the mean of its divisors is an integer number (45272272).

Almost surely, 2^90544543 is an apocalyptic number.

90544543 is a deficient number, since it is larger than the sum of its proper divisors (1).

90544543 is an equidigital number, since it uses as much as digits as its factorization.

90544543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 90544543 is about 9515.4896353262. The cubic root of 90544543 is about 449.0424792359.

Subtracting from 90544543 its sum of digits (34), we obtain a palindrome (90544509).

The spelling of 90544543 in words is "ninety million, five hundred forty-four thousand, five hundred forty-three".