91477843 has 2 divisors, whose sum is σ = 91477844. Its totient is φ = 91477842.

The previous prime is 91477829. The next prime is 91477871. The reversal of 91477843 is 34877419.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91477843 - 2⁵ = 91477811 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91477843.

It is not a weakly prime, because it can be changed into another prime (91477873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45738921 + 45738922.

It is an arithmetic number, because the mean of its divisors is an integer number (45738922).

Almost surely, 2^91477843 is an apocalyptic number.

91477843 is a deficient number, since it is larger than the sum of its proper divisors (1).

91477843 is an equidigital number, since it uses as much as digits as its factorization.

91477843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 43.

The square root of 91477843 is about 9564.4049997896. The cubic root of 91477843 is about 450.5800634821.

The spelling of 91477843 in words is "ninety-one million, four hundred seventy-seven thousand, eight hundred forty-three".