91013044 has 24 divisors (see below), whose sum is σ = 164095400. Its totient is φ = 44136576.

The previous prime is 91013003. The next prime is 91013077. The reversal of 91013044 is 44031019.

It can be written as a sum of positive squares in 4 ways, for example, as 31136400 + 59876644 = 5580^2 + 7738^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57982 + ... + 59530.

Almost surely, 2^91013044 is an apocalyptic number.

It is an amenable number.

91013044 is a deficient number, since it is larger than the sum of its proper divisors (73082356).

91013044 is a wasteful number, since it uses less digits than its factorization.

91013044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1987 (or 1985 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 91013044 is about 9540.0756810415. The cubic root of 91013044 is about 449.8156347638.

The spelling of 91013044 in words is "ninety-one million, thirteen thousand, forty-four".