91813141 has 16 divisors (see below), whose sum is σ = 112216320. Its totient is φ = 73324800.

The previous prime is 91813133. The next prime is 91813147. The reversal of 91813141 is 14131819.

It is a cyclic number.

It is not a de Polignac number, because 91813141 - 2³ = 91813133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91813147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8200 + ... + 15838.

It is an arithmetic number, because the mean of its divisors is an integer number (7013520).

Almost surely, 2^91813141 is an apocalyptic number.

It is an amenable number.

91813141 is a deficient number, since it is larger than the sum of its proper divisors (20403179).

91813141 is a wasteful number, since it uses less digits than its factorization.

91813141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7764.

The product of its digits is 864, while the sum is 28.

The square root of 91813141 is about 9581.9173968470. The cubic root of 91813141 is about 451.1299029442.

The spelling of 91813141 in words is "ninety-one million, eight hundred thirteen thousand, one hundred forty-one".