91134231 has 4 divisors (see below), whose sum is σ = 121512312. Its totient is φ = 60756152.

The previous prime is 91134223. The next prime is 91134233. The reversal of 91134231 is 13243119.

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 91134231 - 2³ = 91134223 is a prime.

It is a super-2 number, since 2×91134231² = 16610896119922722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91134233) 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, 15189036 + ... + 15189041.

It is an arithmetic number, because the mean of its divisors is an integer number (30378078).

Almost surely, 2^91134231 is an apocalyptic number.

91134231 is a deficient number, since it is larger than the sum of its proper divisors (30378081).

91134231 is a wasteful number, since it uses less digits than its factorization.

91134231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30378080.

The product of its digits is 648, while the sum is 24.

The square root of 91134231 is about 9546.4250376777. The cubic root of 91134231 is about 450.0151945487.

The spelling of 91134231 in words is "ninety-one million, one hundred thirty-four thousand, two hundred thirty-one".