91495487 has 4 divisors (see below), whose sum is σ = 93968376. Its totient is φ = 89022600.

The previous prime is 91495483. The next prime is 91495501. The reversal of 91495487 is 78459419.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91495487 - 2² = 91495483 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 (91495483) 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, 1236389 + ... + 1236462.

It is an arithmetic number, because the mean of its divisors is an integer number (23492094).

Almost surely, 2^91495487 is an apocalyptic number.

91495487 is a deficient number, since it is larger than the sum of its proper divisors (2472889).

91495487 is a wasteful number, since it uses less digits than its factorization.

91495487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2472888.

The product of its digits is 362880, while the sum is 47.

The square root of 91495487 is about 9565.3273336567. The cubic root of 91495487 is about 450.6090305096.

The spelling of 91495487 in words is "ninety-one million, four hundred ninety-five thousand, four hundred eighty-seven".