91267313 has 2 divisors, whose sum is σ = 91267314. Its totient is φ = 91267312.

The previous prime is 91267291. The next prime is 91267331. The reversal of 91267313 is 31376219.

It is a happy number.

Together with next prime (91267331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72880369 + 18386944 = 8537^2 + 4288^2 .

It is a cyclic number.

It is not a de Polignac number, because 91267313 - 2¹⁰ = 91266289 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91267313.

It is not a weakly prime, because it can be changed into another prime (91267343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45633656 + 45633657.

It is an arithmetic number, because the mean of its divisors is an integer number (45633657).

Almost surely, 2^91267313 is an apocalyptic number.

It is an amenable number.

91267313 is a deficient number, since it is larger than the sum of its proper divisors (1).

91267313 is an equidigital number, since it uses as much as digits as its factorization.

91267313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 32.

The square root of 91267313 is about 9553.3927481288. The cubic root of 91267313 is about 450.2341382374.

The spelling of 91267313 in words is "ninety-one million, two hundred sixty-seven thousand, three hundred thirteen".