91061273 has 2 divisors, whose sum is σ = 91061274. Its totient is φ = 91061272.

The previous prime is 91061233. The next prime is 91061317. The reversal of 91061273 is 37216019.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90878089 + 183184 = 9533^2 + 428^2 .

It is a cyclic number.

It is not a de Polignac number, because 91061273 - 2¹⁸ = 90799129 is a prime.

It is not a weakly prime, because it can be changed into another prime (91061213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45530636 + 45530637.

It is an arithmetic number, because the mean of its divisors is an integer number (45530637).

Almost surely, 2^91061273 is an apocalyptic number.

It is an amenable number.

91061273 is a deficient number, since it is larger than the sum of its proper divisors (1).

91061273 is an equidigital number, since it uses as much as digits as its factorization.

91061273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 91061273 is about 9542.6030515787. The cubic root of 91061273 is about 449.8950751254.

The spelling of 91061273 in words is "ninety-one million, sixty-one thousand, two hundred seventy-three".