91563485 has 8 divisors (see below), whose sum is σ = 118328280. Its totient is φ = 67616064.

The previous prime is 91563481. The next prime is 91563487. The reversal of 91563485 is 58436519.

It can be written as a sum of positive squares in 4 ways, for example, as 3916441 + 87647044 = 1979^2 + 9362^2 .

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 91563485 - 2² = 91563481 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91563481) 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, 704270 + ... + 704399.

It is an arithmetic number, because the mean of its divisors is an integer number (14791035).

Almost surely, 2^91563485 is an apocalyptic number.

It is an amenable number.

91563485 is a deficient number, since it is larger than the sum of its proper divisors (26764795).

91563485 is a wasteful number, since it uses less digits than its factorization.

91563485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1408687.

The product of its digits is 129600, while the sum is 41.

The square root of 91563485 is about 9568.8810735634. The cubic root of 91563485 is about 450.7206313709.

The spelling of 91563485 in words is "ninety-one million, five hundred sixty-three thousand, four hundred eighty-five".