91748893 has 2 divisors, whose sum is σ = 91748894. Its totient is φ = 91748892.

The previous prime is 91748887. The next prime is 91748903. The reversal of 91748893 is 39884719.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79512889 + 12236004 = 8917^2 + 3498^2 .

It is a cyclic number.

It is not a de Polignac number, because 91748893 - 2⁹ = 91748381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91748843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45874446 + 45874447.

It is an arithmetic number, because the mean of its divisors is an integer number (45874447).

Almost surely, 2^91748893 is an apocalyptic number.

It is an amenable number.

91748893 is a deficient number, since it is larger than the sum of its proper divisors (1).

91748893 is an equidigital number, since it uses as much as digits as its factorization.

91748893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 49.

The square root of 91748893 is about 9578.5642452301. The cubic root of 91748893 is about 451.0246494657.

The spelling of 91748893 in words is "ninety-one million, seven hundred forty-eight thousand, eight hundred ninety-three".