91289826913 has 2 divisors, whose sum is σ = 91289826914. Its totient is φ = 91289826912.

The previous prime is 91289826899. The next prime is 91289826941. The reversal of 91289826913 is 31962898219.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71983280209 + 19306546704 = 268297^2 + 138948^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91289826913 is a prime.

It is not a weakly prime, because it can be changed into another prime (91289826013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45644913456 + 45644913457.

It is an arithmetic number, because the mean of its divisors is an integer number (45644913457).

Almost surely, 2^91289826913 is an apocalyptic number.

It is an amenable number.

91289826913 is a deficient number, since it is larger than the sum of its proper divisors (1).

91289826913 is an equidigital number, since it uses as much as digits as its factorization.

91289826913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3359232, while the sum is 58.

The spelling of 91289826913 in words is "ninety-one billion, two hundred eighty-nine million, eight hundred twenty-six thousand, nine hundred thirteen".