91354231 has 4 divisors (see below), whose sum is σ = 93478792. Its totient is φ = 89229672.

The previous prime is 91354217. The next prime is 91354247. The reversal of 91354231 is 13245319.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13245319 = 1733 ⋅7643.

It is a cyclic number.

It is not a de Polignac number, because 91354231 - 2¹⁷ = 91223159 is a prime.

It is a super-3 number, since 3×91354231³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91354231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91354201) 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, 1062216 + ... + 1062301.

It is an arithmetic number, because the mean of its divisors is an integer number (23369698).

Almost surely, 2^91354231 is an apocalyptic number.

91354231 is a deficient number, since it is larger than the sum of its proper divisors (2124561).

91354231 is a wasteful number, since it uses less digits than its factorization.

91354231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2124560.

The product of its digits is 3240, while the sum is 28.

The square root of 91354231 is about 9557.9407300945. The cubic root of 91354231 is about 450.3770190171.

It can be divided in two parts, 9135 and 4231, that added together give a triangular number (13366 = T₁₆₃).

The spelling of 91354231 in words is "ninety-one million, three hundred fifty-four thousand, two hundred thirty-one".