91056423 has 4 divisors (see below), whose sum is σ = 121408568. Its totient is φ = 60704280.

The previous prime is 91056421. The next prime is 91056431. The reversal of 91056423 is 32465019.

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

It is not a de Polignac number, because 91056423 - 2¹ = 91056421 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 (91056421) 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, 15176068 + ... + 15176073.

It is an arithmetic number, because the mean of its divisors is an integer number (30352142).

Almost surely, 2^91056423 is an apocalyptic number.

91056423 is a deficient number, since it is larger than the sum of its proper divisors (30352145).

91056423 is a wasteful number, since it uses less digits than its factorization.

91056423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30352144.

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

The square root of 91056423 is about 9542.3489246621. The cubic root of 91056423 is about 449.8870877202.

The spelling of 91056423 in words is "ninety-one million, fifty-six thousand, four hundred twenty-three".