91383503 has 2 divisors, whose sum is σ = 91383504. Its totient is φ = 91383502.

The previous prime is 91383497. The next prime is 91383527. The reversal of 91383503 is 30538319.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91383503 - 2²⁰ = 90334927 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91383503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91383533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45691751 + 45691752.

It is an arithmetic number, because the mean of its divisors is an integer number (45691752).

Almost surely, 2^91383503 is an apocalyptic number.

91383503 is a deficient number, since it is larger than the sum of its proper divisors (1).

91383503 is an equidigital number, since it uses as much as digits as its factorization.

91383503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 91383503 is about 9559.4718996396. The cubic root of 91383503 is about 450.4251176040.

The spelling of 91383503 in words is "ninety-one million, three hundred eighty-three thousand, five hundred three".