91013783 has 8 divisors (see below), whose sum is σ = 108538368. Its totient is φ = 74619864.

The previous prime is 91013779. The next prime is 91013789. The reversal of 91013783 is 38731019.

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 91013783 - 2² = 91013779 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91013789) 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, 282491 + ... + 282812.

It is an arithmetic number, because the mean of its divisors is an integer number (13567296).

Almost surely, 2^91013783 is an apocalyptic number.

91013783 is a deficient number, since it is larger than the sum of its proper divisors (17524585).

91013783 is a wasteful number, since it uses less digits than its factorization.

91013783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565333.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 91013783 is about 9540.1144123118. The cubic root of 91013783 is about 449.8168522188.

The spelling of 91013783 in words is "ninety-one million, thirteen thousand, seven hundred eighty-three".