91349617 has 2 divisors, whose sum is σ = 91349618. Its totient is φ = 91349616.

The previous prime is 91349563. The next prime is 91349627. The reversal of 91349617 is 71694319.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89851441 + 1498176 = 9479^2 + 1224^2 .

It is a cyclic number.

It is not a de Polignac number, because 91349617 - 2¹¹ = 91347569 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91349617.

It is not a weakly prime, because it can be changed into another prime (91349627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45674808 + 45674809.

It is an arithmetic number, because the mean of its divisors is an integer number (45674809).

Almost surely, 2^91349617 is an apocalyptic number.

It is an amenable number.

91349617 is a deficient number, since it is larger than the sum of its proper divisors (1).

91349617 is an equidigital number, since it uses as much as digits as its factorization.

91349617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 40.

The square root of 91349617 is about 9557.6993570629. The cubic root of 91349617 is about 450.3694365384.

The spelling of 91349617 in words is "ninety-one million, three hundred forty-nine thousand, six hundred seventeen".