91043541 has 16 divisors (see below), whose sum is σ = 135493120. Its totient is φ = 60419520.

The previous prime is 91043539. The next prime is 91043581. The reversal of 91043541 is 14534019.

It is not a de Polignac number, because 91043541 - 2¹ = 91043539 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91043501) 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, 1540 + ... + 13581.

It is an arithmetic number, because the mean of its divisors is an integer number (8468320).

Almost surely, 2^91043541 is an apocalyptic number.

It is an amenable number.

91043541 is a deficient number, since it is larger than the sum of its proper divisors (44449579).

91043541 is a wasteful number, since it uses less digits than its factorization.

91043541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15353 (or 15347 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 91043541 is about 9541.6739097498. The cubic root of 91043541 is about 449.8658711361.

The spelling of 91043541 in words is "ninety-one million, forty-three thousand, five hundred forty-one".