91243423 has 8 divisors (see below), whose sum is σ = 92610000. Its totient is φ = 89884608.

The previous prime is 91243421. The next prime is 91243433. The reversal of 91243423 is 32434219.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91243423 - 2¹ = 91243421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91243391 and 91243400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91243421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24328 + ... + 27826.

It is an arithmetic number, because the mean of its divisors is an integer number (11576250).

Almost surely, 2^91243423 is an apocalyptic number.

91243423 is a deficient number, since it is larger than the sum of its proper divisors (1366577).

91243423 is a wasteful number, since it uses less digits than its factorization.

91243423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3881.

The product of its digits is 5184, while the sum is 28.

The square root of 91243423 is about 9552.1423251541. The cubic root of 91243423 is about 450.1948505967.

The spelling of 91243423 in words is "ninety-one million, two hundred forty-three thousand, four hundred twenty-three".