91408288399 has 2 divisors, whose sum is σ = 91408288400. Its totient is φ = 91408288398.

The previous prime is 91408288381. The next prime is 91408288403. The reversal of 91408288399 is 99388280419.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91408288399 - 2¹⁹ = 91407764111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91408288369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45704144199 + 45704144200.

It is an arithmetic number, because the mean of its divisors is an integer number (45704144200).

Almost surely, 2^91408288399 is an apocalyptic number.

91408288399 is a deficient number, since it is larger than the sum of its proper divisors (1).

91408288399 is an equidigital number, since it uses as much as digits as its factorization.

91408288399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8957952, while the sum is 61.

The spelling of 91408288399 in words is "ninety-one billion, four hundred eight million, two hundred eighty-eight thousand, three hundred ninety-nine".