91747273 has 2 divisors, whose sum is σ = 91747274. Its totient is φ = 91747272.

The previous prime is 91747261. The next prime is 91747297. The reversal of 91747273 is 37274719.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90383049 + 1364224 = 9507^2 + 1168^2 .

It is a cyclic number.

It is not a de Polignac number, because 91747273 - 2¹⁷ = 91616201 is a prime.

It is not a weakly prime, because it can be changed into another prime (91747223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45873636 + 45873637.

It is an arithmetic number, because the mean of its divisors is an integer number (45873637).

Almost surely, 2^91747273 is an apocalyptic number.

It is an amenable number.

91747273 is a deficient number, since it is larger than the sum of its proper divisors (1).

91747273 is an equidigital number, since it uses as much as digits as its factorization.

91747273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 74088, while the sum is 40.

The square root of 91747273 is about 9578.4796810350. The cubic root of 91747273 is about 451.0219948860.

The spelling of 91747273 in words is "ninety-one million, seven hundred forty-seven thousand, two hundred seventy-three".