91628863 has 2 divisors, whose sum is σ = 91628864. Its totient is φ = 91628862.

The previous prime is 91628843. The next prime is 91628869. The reversal of 91628863 is 36882619.

It is a strong prime.

It is an emirp because it is prime and its reverse (36882619) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91628863 - 2²¹ = 89531711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91628869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45814431 + 45814432.

It is an arithmetic number, because the mean of its divisors is an integer number (45814432).

Almost surely, 2^91628863 is an apocalyptic number.

91628863 is a deficient number, since it is larger than the sum of its proper divisors (1).

91628863 is an equidigital number, since it uses as much as digits as its factorization.

91628863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 43.

The square root of 91628863 is about 9572.2966418723. The cubic root of 91628863 is about 450.8278801024.

The spelling of 91628863 in words is "ninety-one million, six hundred twenty-eight thousand, eight hundred sixty-three".