91281955 has 8 divisors (see below), whose sum is σ = 109602432. Its totient is φ = 72982848.

The previous prime is 91281913. The next prime is 91281961. The reversal of 91281955 is 55918219.

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

It is a cyclic number.

It is not a de Polignac number, because 91281955 - 2¹⁷ = 91150883 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6414 + ... + 14956.

It is an arithmetic number, because the mean of its divisors is an integer number (13700304).

Almost surely, 2^91281955 is an apocalyptic number.

91281955 is a deficient number, since it is larger than the sum of its proper divisors (18320477).

91281955 is a wasteful number, since it uses less digits than its factorization.

91281955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10685.

The product of its digits is 32400, while the sum is 40.

The square root of 91281955 is about 9554.1590420089. The cubic root of 91281955 is about 450.2582139462.

The spelling of 91281955 in words is "ninety-one million, two hundred eighty-one thousand, nine hundred fifty-five".