91130213 has 16 divisors (see below), whose sum is σ = 98208000. Its totient is φ = 84307392.

The previous prime is 91130147. The next prime is 91130219. The reversal of 91130213 is 31203119.

It is a cyclic number.

It is not a de Polignac number, because 91130213 - 2⁸ = 91129957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91130219) 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, 163331 + ... + 163887.

It is an arithmetic number, because the mean of its divisors is an integer number (6138000).

Almost surely, 2^91130213 is an apocalyptic number.

It is an amenable number.

91130213 is a deficient number, since it is larger than the sum of its proper divisors (7077787).

91130213 is a wasteful number, since it uses less digits than its factorization.

91130213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 91130213 is about 9546.2145900875. The cubic root of 91130213 is about 450.0085809063.

The spelling of 91130213 in words is "ninety-one million, one hundred thirty thousand, two hundred thirteen".