91548689 has 4 divisors (see below), whose sum is σ = 96933924. Its totient is φ = 86163456.

The previous prime is 91548661. The next prime is 91548703. The reversal of 91548689 is 98684519.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98684519 = 61 ⋅1617779.

It can be written as a sum of positive squares in 2 ways, for example, as 43454464 + 48094225 = 6592^2 + 6935^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91548689 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (91548629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2692592 + ... + 2692625.

It is an arithmetic number, because the mean of its divisors is an integer number (24233481).

Almost surely, 2^91548689 is an apocalyptic number.

It is an amenable number.

91548689 is a deficient number, since it is larger than the sum of its proper divisors (5385235).

91548689 is a wasteful number, since it uses less digits than its factorization.

91548689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5385234.

The product of its digits is 622080, while the sum is 50.

The square root of 91548689 is about 9568.1079111808. The cubic root of 91548689 is about 450.6963523267.

The spelling of 91548689 in words is "ninety-one million, five hundred forty-eight thousand, six hundred eighty-nine".