91436783 has 2 divisors, whose sum is σ = 91436784. Its totient is φ = 91436782.

The previous prime is 91436777. The next prime is 91436801. The reversal of 91436783 is 38763419.

It is a weak prime.

It is an emirp because it is prime and its reverse (38763419) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91436783 - 2¹² = 91432687 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91436783.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91436083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45718391 + 45718392.

It is an arithmetic number, because the mean of its divisors is an integer number (45718392).

Almost surely, 2^91436783 is an apocalyptic number.

91436783 is a deficient number, since it is larger than the sum of its proper divisors (1).

91436783 is an equidigital number, since it uses as much as digits as its factorization.

91436783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 41.

The square root of 91436783 is about 9562.2582583823. The cubic root of 91436783 is about 450.5126388267.

The spelling of 91436783 in words is "ninety-one million, four hundred thirty-six thousand, seven hundred eighty-three".