91103214529 has 2 divisors, whose sum is σ = 91103214530. Its totient is φ = 91103214528.

The previous prime is 91103214487. The next prime is 91103214599. The reversal of 91103214529 is 92541230119.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68187310129 + 22915904400 = 261127^2 + 151380^2 .

It is a cyclic number.

It is not a de Polignac number, because 91103214529 - 2¹⁵ = 91103181761 is a prime.

It is not a weakly prime, because it can be changed into another prime (91103214599) 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, 45551607264 + 45551607265.

It is an arithmetic number, because the mean of its divisors is an integer number (45551607265).

Almost surely, 2^91103214529 is an apocalyptic number.

It is an amenable number.

91103214529 is a deficient number, since it is larger than the sum of its proper divisors (1).

91103214529 is an equidigital number, since it uses as much as digits as its factorization.

91103214529 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 37.

The spelling of 91103214529 in words is "ninety-one billion, one hundred three million, two hundred fourteen thousand, five hundred twenty-nine".