91315443 has 16 divisors (see below), whose sum is σ = 123849216. Its totient is φ = 59834880.

The previous prime is 91315423. The next prime is 91315457. The reversal of 91315443 is 34451319.

It is not a de Polignac number, because 91315443 - 2⁶ = 91315379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91315443.

It is not an unprimeable number, because it can be changed into a prime (91315423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122530 + ... + 123272.

It is an arithmetic number, because the mean of its divisors is an integer number (7740576).

Almost surely, 2^91315443 is an apocalyptic number.

91315443 is a deficient number, since it is larger than the sum of its proper divisors (32533773).

91315443 is a wasteful number, since it uses less digits than its factorization.

91315443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1394.

The product of its digits is 6480, while the sum is 30.

The square root of 91315443 is about 9555.9114165003. The cubic root of 91315443 is about 450.3132682869.

The spelling of 91315443 in words is "ninety-one million, three hundred fifteen thousand, four hundred forty-three".