91434581 has 8 divisors (see below), whose sum is σ = 105969024. Its totient is φ = 77268240.

The previous prime is 91434557. The next prime is 91434583. The reversal of 91434581 is 18543419.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-91434581 is a prime.

It is a super-2 number, since 2×91434581² = 16720565205291122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91434583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91490 + ... + 92483.

It is an arithmetic number, because the mean of its divisors is an integer number (13246128).

Almost surely, 2^91434581 is an apocalyptic number.

It is an amenable number.

91434581 is a deficient number, since it is larger than the sum of its proper divisors (14534443).

91434581 is a wasteful number, since it uses less digits than its factorization.

91434581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184051.

The product of its digits is 17280, while the sum is 35.

The square root of 91434581 is about 9562.1431175234. The cubic root of 91434581 is about 450.5090223507.

The spelling of 91434581 in words is "ninety-one million, four hundred thirty-four thousand, five hundred eighty-one".