91275729403 has 2 divisors, whose sum is σ = 91275729404. Its totient is φ = 91275729402.

The previous prime is 91275729343. The next prime is 91275729427. The reversal of 91275729403 is 30492757219.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91275729403 - 2¹³ = 91275721211 is a prime.

It is not a weakly prime, because it can be changed into another prime (91275729443) 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, 45637864701 + 45637864702.

It is an arithmetic number, because the mean of its divisors is an integer number (45637864702).

Almost surely, 2^91275729403 is an apocalyptic number.

91275729403 is a deficient number, since it is larger than the sum of its proper divisors (1).

91275729403 is an equidigital number, since it uses as much as digits as its factorization.

91275729403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 952560, while the sum is 49.

The spelling of 91275729403 in words is "ninety-one billion, two hundred seventy-five million, seven hundred twenty-nine thousand, four hundred three".