91134553 has 4 divisors (see below), whose sum is σ = 91167760. Its totient is φ = 91101348.

The previous prime is 91134529. The next prime is 91134557. The reversal of 91134553 is 35543119.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35543119 = 23 ⋅1545353.

It is a cyclic number.

It is not a de Polignac number, because 91134553 - 2⁵ = 91134521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91134557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12075 + ... + 18112.

It is an arithmetic number, because the mean of its divisors is an integer number (22791940).

Almost surely, 2^91134553 is an apocalyptic number.

91134553 is the 6038-th heptagonal number.

It is an amenable number.

91134553 is a deficient number, since it is larger than the sum of its proper divisors (33207).

91134553 is a wasteful number, since it uses less digits than its factorization.

91134553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33206.

The product of its digits is 8100, while the sum is 31.

The square root of 91134553 is about 9546.4419026148. The cubic root of 91134553 is about 450.0157245534.

The spelling of 91134553 in words is "ninety-one million, one hundred thirty-four thousand, five hundred fifty-three".