91244043 has 32 divisors (see below), whose sum is σ = 148742400. Its totient is φ = 55277640.

The previous prime is 91243991. The next prime is 91244047. The reversal of 91244043 is 34044219.

It is not a de Polignac number, because 91244043 - 2¹² = 91239947 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 91243998 and 91244016.

It is not an unprimeable number, because it can be changed into a prime (91244047) 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 31 ways as a sum of consecutive naturals, for example, 34668 + ... + 37206.

It is an arithmetic number, because the mean of its divisors is an integer number (4648200).

Almost surely, 2^91244043 is an apocalyptic number.

91244043 is a deficient number, since it is larger than the sum of its proper divisors (57498357).

91244043 is a wasteful number, since it uses less digits than its factorization.

91244043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2581 (or 2553 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 91244043 is about 9552.1747785517. The cubic root of 91244043 is about 450.1958702873.

The spelling of 91244043 in words is "ninety-one million, two hundred forty-four thousand, forty-three".