91348261 has 2 divisors, whose sum is σ = 91348262. Its totient is φ = 91348260.

The previous prime is 91348241. The next prime is 91348267. The reversal of 91348261 is 16284319.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85192900 + 6155361 = 9230^2 + 2481^2 .

It is an emirp because it is prime and its reverse (16284319) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91348261 - 2⁷ = 91348133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91348267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45674130 + 45674131.

It is an arithmetic number, because the mean of its divisors is an integer number (45674131).

Almost surely, 2^91348261 is an apocalyptic number.

It is an amenable number.

91348261 is a deficient number, since it is larger than the sum of its proper divisors (1).

91348261 is an equidigital number, since it uses as much as digits as its factorization.

91348261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 34.

The square root of 91348261 is about 9557.6284192262. The cubic root of 91348261 is about 450.3672080890.

The spelling of 91348261 in words is "ninety-one million, three hundred forty-eight thousand, two hundred sixty-one".