91187485 has 8 divisors (see below), whose sum is σ = 112094136. Its totient is φ = 71170560.

The previous prime is 91187483. The next prime is 91187519. The reversal of 91187485 is 58478119.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 956484 + 90231001 = 978^2 + 9499^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91187485 - 2¹ = 91187483 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91187483) 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, 222204 + ... + 222613.

It is an arithmetic number, because the mean of its divisors is an integer number (14011767).

Almost surely, 2^91187485 is an apocalyptic number.

It is an amenable number.

91187485 is a deficient number, since it is larger than the sum of its proper divisors (20906651).

91187485 is a wasteful number, since it uses less digits than its factorization.

91187485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444863.

The product of its digits is 80640, while the sum is 43.

The square root of 91187485 is about 9549.2138419872. The cubic root of 91187485 is about 450.1028324664.

The spelling of 91187485 in words is "ninety-one million, one hundred eighty-seven thousand, four hundred eighty-five".