91152517 has 2 divisors, whose sum is σ = 91152518. Its totient is φ = 91152516.

The previous prime is 91152511. The next prime is 91152563. The reversal of 91152517 is 71525119.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71385601 + 19766916 = 8449^2 + 4446^2 .

It is an emirp because it is prime and its reverse (71525119) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91152517 - 2¹¹ = 91150469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91152511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45576258 + 45576259.

It is an arithmetic number, because the mean of its divisors is an integer number (45576259).

Almost surely, 2^91152517 is an apocalyptic number.

It is an amenable number.

91152517 is a deficient number, since it is larger than the sum of its proper divisors (1).

91152517 is an equidigital number, since it uses as much as digits as its factorization.

91152517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3150, while the sum is 31.

The square root of 91152517 is about 9547.3827303612. The cubic root of 91152517 is about 450.0452909147.

The spelling of 91152517 in words is "ninety-one million, one hundred fifty-two thousand, five hundred seventeen".