91383513 has 16 divisors (see below), whose sum is σ = 131389440. Its totient is φ = 56162304.

The previous prime is 91383503. The next prime is 91383527. The reversal of 91383513 is 31538319.

It is not a de Polignac number, because 91383513 - 2⁴ = 91383497 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (91383503) 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, 54120 + ... + 55782.

It is an arithmetic number, because the mean of its divisors is an integer number (8211840).

Almost surely, 2^91383513 is an apocalyptic number.

It is an amenable number.

91383513 is a deficient number, since it is larger than the sum of its proper divisors (40005927).

91383513 is a wasteful number, since it uses less digits than its factorization.

91383513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3088.

The product of its digits is 9720, while the sum is 33.

The square root of 91383513 is about 9559.4724226811. The cubic root of 91383513 is about 450.4251340339.

The spelling of 91383513 in words is "ninety-one million, three hundred eighty-three thousand, five hundred thirteen".