91071423 has 6 divisors (see below), whose sum is σ = 131547624. Its totient is φ = 60714276.

The previous prime is 91071413. The next prime is 91071433. The reversal of 91071423 is 32417019.

It is an interprime number because it is at equal distance from previous prime (91071413) and next prime (91071433).

It is not a de Polignac number, because 91071423 - 2⁶ = 91071359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91071413) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5059515 + ... + 5059532.

It is an arithmetic number, because the mean of its divisors is an integer number (21924604).

Almost surely, 2^91071423 is an apocalyptic number.

91071423 is a deficient number, since it is larger than the sum of its proper divisors (40476201).

91071423 is a wasteful number, since it uses less digits than its factorization.

91071423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10119053 (or 10119050 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 91071423 is about 9543.1348622976. The cubic root of 91071423 is about 449.9117901175.

The spelling of 91071423 in words is "ninety-one million, seventy-one thousand, four hundred twenty-three".