91456423 has 4 divisors (see below), whose sum is σ = 91580920. Its totient is φ = 91331928.

The previous prime is 91456411. The next prime is 91456427. The reversal of 91456423 is 32465419.

It is a happy number.

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 91456423 - 2²¹ = 89359271 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 (91456427) 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, 61140 + ... + 62617.

It is an arithmetic number, because the mean of its divisors is an integer number (22895230).

Almost surely, 2^91456423 is an apocalyptic number.

91456423 is a deficient number, since it is larger than the sum of its proper divisors (124497).

91456423 is a wasteful number, since it uses less digits than its factorization.

91456423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124496.

The product of its digits is 25920, while the sum is 34.

The square root of 91456423 is about 9563.2851573087. The cubic root of 91456423 is about 450.5448922026.

The spelling of 91456423 in words is "ninety-one million, four hundred fifty-six thousand, four hundred twenty-three".