91896773 has 2 divisors, whose sum is σ = 91896774. Its totient is φ = 91896772.

The previous prime is 91896743. The next prime is 91896817. The reversal of 91896773 is 37769819.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84676804 + 7219969 = 9202^2 + 2687^2 .

It is an emirp because it is prime and its reverse (37769819) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91896773 - 2⁸ = 91896517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91896743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45948386 + 45948387.

It is an arithmetic number, because the mean of its divisors is an integer number (45948387).

Almost surely, 2^91896773 is an apocalyptic number.

It is an amenable number.

91896773 is a deficient number, since it is larger than the sum of its proper divisors (1).

91896773 is an equidigital number, since it uses as much as digits as its factorization.

91896773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 571536, while the sum is 50.

The square root of 91896773 is about 9586.2804569864. The cubic root of 91896773 is about 451.2668384843.

The spelling of 91896773 in words is "ninety-one million, eight hundred ninety-six thousand, seven hundred seventy-three".