91872343 has 4 divisors (see below), whose sum is σ = 93243640. Its totient is φ = 90501048.

The previous prime is 91872331. The next prime is 91872371. The reversal of 91872343 is 34327819.

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 91872343 - 2⁹ = 91871831 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 (91872323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 685548 + ... + 685681.

It is an arithmetic number, because the mean of its divisors is an integer number (23310910).

Almost surely, 2^91872343 is an apocalyptic number.

91872343 is a deficient number, since it is larger than the sum of its proper divisors (1371297).

91872343 is a wasteful number, since it uses less digits than its factorization.

91872343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371296.

The product of its digits is 36288, while the sum is 37.

The square root of 91872343 is about 9585.0061554492. The cubic root of 91872343 is about 451.2268464165.

The spelling of 91872343 in words is "ninety-one million, eight hundred seventy-two thousand, three hundred forty-three".