91896517 has 2 divisors, whose sum is σ = 91896518. Its totient is φ = 91896516.

The previous prime is 91896503. The next prime is 91896533. The reversal of 91896517 is 71569819.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64866916 + 27029601 = 8054^2 + 5199^2 .

It is an emirp because it is prime and its reverse (71569819) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91896517 - 2¹⁵ = 91863749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91896557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45948258 + 45948259.

It is an arithmetic number, because the mean of its divisors is an integer number (45948259).

Almost surely, 2^91896517 is an apocalyptic number.

It is an amenable number.

91896517 is a deficient number, since it is larger than the sum of its proper divisors (1).

91896517 is an equidigital number, since it uses as much as digits as its factorization.

91896517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 46.

The square root of 91896517 is about 9586.2671045616. The cubic root of 91896517 is about 451.2664194474.

The spelling of 91896517 in words is "ninety-one million, eight hundred ninety-six thousand, five hundred seventeen".