91830013 has 8 divisors (see below), whose sum is σ = 100257696. Its totient is φ = 83415600.

The previous prime is 91830001. The next prime is 91830023. The reversal of 91830013 is 31003819.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91830013 - 2⁵ = 91829981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91830013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91830023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16158 + ... + 21088.

It is an arithmetic number, because the mean of its divisors is an integer number (12532212).

Almost surely, 2^91830013 is an apocalyptic number.

It is an amenable number.

91830013 is a deficient number, since it is larger than the sum of its proper divisors (8427683).

91830013 is a wasteful number, since it uses less digits than its factorization.

91830013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6635.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 91830013 is about 9582.7977647449. The cubic root of 91830013 is about 451.1575351453.

The spelling of 91830013 in words is "ninety-one million, eight hundred thirty thousand, thirteen".