91488547 has 4 divisors (see below), whose sum is σ = 93214800. Its totient is φ = 89762296.

The previous prime is 91488517. The next prime is 91488571. The reversal of 91488547 is 74588419.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74588419 = 1051 ⋅70969.

It is a cyclic number.

It is not a de Polignac number, because 91488547 - 2¹⁵ = 91455779 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91488497 and 91488506.

It is not an unprimeable number, because it can be changed into a prime (91488517) 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, 863047 + ... + 863152.

It is an arithmetic number, because the mean of its divisors is an integer number (23303700).

Almost surely, 2^91488547 is an apocalyptic number.

91488547 is a deficient number, since it is larger than the sum of its proper divisors (1726253).

91488547 is a wasteful number, since it uses less digits than its factorization.

91488547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1726252.

The product of its digits is 322560, while the sum is 46.

The square root of 91488547 is about 9564.9645582198. The cubic root of 91488547 is about 450.5976372127.

The spelling of 91488547 in words is "ninety-one million, four hundred eighty-eight thousand, five hundred forty-seven".