91231343 has 4 divisors (see below), whose sum is σ = 104264400. Its totient is φ = 78198288.

The previous prime is 91231321. The next prime is 91231373. The reversal of 91231343 is 34313219.

It is a happy number.

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

It is not a de Polignac number, because 91231343 - 2⁶ = 91231279 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91231373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6516518 + ... + 6516531.

It is an arithmetic number, because the mean of its divisors is an integer number (26066100).

Almost surely, 2^91231343 is an apocalyptic number.

91231343 is a deficient number, since it is larger than the sum of its proper divisors (13033057).

91231343 is a wasteful number, since it uses less digits than its factorization.

91231343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13033056.

The product of its digits is 1944, while the sum is 26.

The square root of 91231343 is about 9551.5099853374. The cubic root of 91231343 is about 450.1749821553.

The spelling of 91231343 in words is "ninety-one million, two hundred thirty-one thousand, three hundred forty-three".