90561541 has 8 divisors (see below), whose sum is σ = 104314880. Its totient is φ = 77012208.

The previous prime is 90561539. The next prime is 90561547. The reversal of 90561541 is 14516509.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90561541 - 2¹ = 90561539 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 (90561547) 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 in 7 ways as a sum of consecutive naturals, for example, 50046 + ... + 51823.

It is an arithmetic number, because the mean of its divisors is an integer number (13039360).

Almost surely, 2^90561541 is an apocalyptic number.

It is an amenable number.

90561541 is a deficient number, since it is larger than the sum of its proper divisors (13753339).

90561541 is a wasteful number, since it uses less digits than its factorization.

90561541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102003.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 90561541 is about 9516.3827686784. The cubic root of 90561541 is about 449.0705771798.

The spelling of 90561541 in words is "ninety million, five hundred sixty-one thousand, five hundred forty-one".