91744273 has 2 divisors, whose sum is σ = 91744274. Its totient is φ = 91744272.

The previous prime is 91744267. The next prime is 91744297. The reversal of 91744273 is 37244719.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68095504 + 23648769 = 8252^2 + 4863^2 .

It is an emirp because it is prime and its reverse (37244719) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91744273 - 2¹³ = 91736081 is a prime.

It is not a weakly prime, because it can be changed into another prime (91744253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45872136 + 45872137.

It is an arithmetic number, because the mean of its divisors is an integer number (45872137).

Almost surely, 2^91744273 is an apocalyptic number.

It is an amenable number.

91744273 is a deficient number, since it is larger than the sum of its proper divisors (1).

91744273 is an equidigital number, since it uses as much as digits as its factorization.

91744273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 37.

The square root of 91744273 is about 9578.3230787022. The cubic root of 91744273 is about 451.0170789153.

The spelling of 91744273 in words is "ninety-one million, seven hundred forty-four thousand, two hundred seventy-three".