91232135 has 4 divisors (see below), whose sum is σ = 109478568. Its totient is φ = 72985704.

The previous prime is 91232107. The next prime is 91232137. The reversal of 91232135 is 53123219.

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 91232135 - 2²² = 87037831 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 (91232137) 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, 9123209 + ... + 9123218.

It is an arithmetic number, because the mean of its divisors is an integer number (27369642).

Almost surely, 2^91232135 is an apocalyptic number.

91232135 is a deficient number, since it is larger than the sum of its proper divisors (18246433).

91232135 is a wasteful number, since it uses less digits than its factorization.

91232135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18246432.

The product of its digits is 1620, while the sum is 26.

The square root of 91232135 is about 9551.5514446607. The cubic root of 91232135 is about 450.1762848419.

The spelling of 91232135 in words is "ninety-one million, two hundred thirty-two thousand, one hundred thirty-five".