90905653 has 8 divisors (see below), whose sum is σ = 92777400. Its totient is φ = 89039808.

The previous prime is 90905641. The next prime is 90905663. The reversal of 90905653 is 35650909.

It can be written as a sum of positive squares in 4 ways, for example, as 11035684 + 79869969 = 3322^2 + 8937^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 90905653 - 2⁹ = 90905141 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 (90905603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42903 + ... + 44971.

It is an arithmetic number, because the mean of its divisors is an integer number (11597175).

Almost surely, 2^90905653 is an apocalyptic number.

It is an amenable number.

90905653 is a deficient number, since it is larger than the sum of its proper divisors (1871747).

90905653 is a wasteful number, since it uses less digits than its factorization.

90905653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2951.

The product of its (nonzero) digits is 36450, while the sum is 37.

The square root of 90905653 is about 9534.4456052777. The cubic root of 90905653 is about 449.6386448848.

The spelling of 90905653 in words is "ninety million, nine hundred five thousand, six hundred fifty-three".