90753561 has 16 divisors (see below), whose sum is σ = 140296320. Its totient is φ = 57871440.

The previous prime is 90753503. The next prime is 90753571. The reversal of 90753561 is 16535709.

It is a happy number.

90753561 is a `hidden beast` number, since 90 + 7 + 5 + 3 + 561 = 666.

It is not a de Polignac number, because 90753561 - 2¹⁵ = 90720793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90753571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72450 + ... + 73691.

It is an arithmetic number, because the mean of its divisors is an integer number (8768520).

Almost surely, 2^90753561 is an apocalyptic number.

It is an amenable number.

90753561 is a deficient number, since it is larger than the sum of its proper divisors (49542759).

90753561 is a wasteful number, since it uses less digits than its factorization.

90753561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146173 (or 146167 counting only the distinct ones).

The product of its (nonzero) digits is 28350, while the sum is 36.

The square root of 90753561 is about 9526.4663438234. The cubic root of 90753561 is about 449.3877451422.

The spelling of 90753561 in words is "ninety million, seven hundred fifty-three thousand, five hundred sixty-one".