91013043 has 16 divisors (see below), whose sum is σ = 132717312. Its totient is φ = 55020000.

The previous prime is 91013003. The next prime is 91013077. The reversal of 91013043 is 34031019.

It is not a de Polignac number, because 91013043 - 2⁸ = 91012787 is a prime.

It is a super-2 number, since 2×91013043² = 16566747992239698, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91013003) 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, 10618 + ... + 17168.

It is an arithmetic number, because the mean of its divisors is an integer number (8294832).

Almost surely, 2^91013043 is an apocalyptic number.

91013043 is a deficient number, since it is larger than the sum of its proper divisors (41704269).

91013043 is a wasteful number, since it uses less digits than its factorization.

91013043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6986.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 91013043 is about 9540.0756286310. The cubic root of 91013043 is about 449.8156331164.

The spelling of 91013043 in words is "ninety-one million, thirteen thousand, forty-three".