91080863 has 2 divisors, whose sum is σ = 91080864. Its totient is φ = 91080862.

The previous prime is 91080853. The next prime is 91080887. The reversal of 91080863 is 36808019.

It is a weak prime.

It is an emirp because it is prime and its reverse (36808019) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91080863 - 2⁸ = 91080607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91080823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45540431 + 45540432.

It is an arithmetic number, because the mean of its divisors is an integer number (45540432).

Almost surely, 2^91080863 is an apocalyptic number.

91080863 is a deficient number, since it is larger than the sum of its proper divisors (1).

91080863 is an equidigital number, since it uses as much as digits as its factorization.

91080863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 91080863 is about 9543.6294458660. The cubic root of 91080863 is about 449.9273347688.

The spelling of 91080863 in words is "ninety-one million, eighty thousand, eight hundred sixty-three".