91481759 has 2 divisors, whose sum is σ = 91481760. Its totient is φ = 91481758.

The previous prime is 91481711. The next prime is 91481773. The reversal of 91481759 is 95718419.

It is a strong prime.

It is an emirp because it is prime and its reverse (95718419) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91481759 - 2⁸ = 91481503 is a prime.

It is a plaindrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91481059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45740879 + 45740880.

It is an arithmetic number, because the mean of its divisors is an integer number (45740880).

Almost surely, 2^91481759 is an apocalyptic number.

91481759 is a deficient number, since it is larger than the sum of its proper divisors (1).

91481759 is an equidigital number, since it uses as much as digits as its factorization.

91481759 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 44.

The square root of 91481759 is about 9564.6097149858. The cubic root of 91481759 is about 450.5864928946.

The spelling of 91481759 in words is "ninety-one million, four hundred eighty-one thousand, seven hundred fifty-nine".