91053553 has 4 divisors (see below), whose sum is σ = 91107828. Its totient is φ = 90999280.

The previous prime is 91053517. The next prime is 91053569. The reversal of 91053553 is 35535019.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35535019 = 13 ⋅2733463.

It can be written as a sum of positive squares in 2 ways, for example, as 72795024 + 18258529 = 8532^2 + 4273^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91053553 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91053653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24538 + ... + 28003.

It is an arithmetic number, because the mean of its divisors is an integer number (22776957).

Almost surely, 2^91053553 is an apocalyptic number.

It is an amenable number.

91053553 is a deficient number, since it is larger than the sum of its proper divisors (54275).

91053553 is a wasteful number, since it uses less digits than its factorization.

91053553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54274.

The product of its (nonzero) digits is 10125, while the sum is 31.

The square root of 91053553 is about 9542.1985412168. The cubic root of 91053553 is about 449.8823610190.

The spelling of 91053553 in words is "ninety-one million, fifty-three thousand, five hundred fifty-three".