90545541 has 4 divisors (see below), whose sum is σ = 120727392. Its totient is φ = 60363692.

The previous prime is 90545509. The next prime is 90545551. The reversal of 90545541 is 14554509.

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.

It is a cyclic number.

It is not a de Polignac number, because 90545541 - 2⁵ = 90545509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90545551) 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, 15090921 + ... + 15090926.

It is an arithmetic number, because the mean of its divisors is an integer number (30181848).

Almost surely, 2^90545541 is an apocalyptic number.

It is an amenable number.

90545541 is a deficient number, since it is larger than the sum of its proper divisors (30181851).

90545541 is a wasteful number, since it uses less digits than its factorization.

90545541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30181850.

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 90545541 is about 9515.5420759934. The cubic root of 90545541 is about 449.0441290417.

The spelling of 90545541 in words is "ninety million, five hundred forty-five thousand, five hundred forty-one".