90543541 has 4 divisors (see below), whose sum is σ = 98774784. Its totient is φ = 82312300.

The previous prime is 90543533. The next prime is 90543587. The reversal of 90543541 is 14534509.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14534509 = 11 ⋅1321319.

It is a cyclic number.

It is not a de Polignac number, because 90543541 - 2³ = 90543533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90543041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4115605 + ... + 4115626.

It is an arithmetic number, because the mean of its divisors is an integer number (24693696).

Almost surely, 2^90543541 is an apocalyptic number.

It is an amenable number.

90543541 is a deficient number, since it is larger than the sum of its proper divisors (8231243).

90543541 is a wasteful number, since it uses less digits than its factorization.

90543541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8231242.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 90543541 is about 9515.4369841852. The cubic root of 90543541 is about 449.0408228054.

The spelling of 90543541 in words is "ninety million, five hundred forty-three thousand, five hundred forty-one".