91406481 has 4 divisors (see below), whose sum is σ = 121875312. Its totient is φ = 60937652.

The previous prime is 91406479. The next prime is 91406527. The reversal of 91406481 is 18460419.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91406481 - 2¹ = 91406479 is a prime.

It is a super-2 number, since 2×91406481² = 16710289537606722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (91406401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15234411 + ... + 15234416.

It is an arithmetic number, because the mean of its divisors is an integer number (30468828).

Almost surely, 2^91406481 is an apocalyptic number.

It is an amenable number.

91406481 is a deficient number, since it is larger than the sum of its proper divisors (30468831).

91406481 is a wasteful number, since it uses less digits than its factorization.

91406481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30468830.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 91406481 is about 9560.6736687328. The cubic root of 91406481 is about 450.4628669448.

The spelling of 91406481 in words is "ninety-one million, four hundred six thousand, four hundred eighty-one".