91103621293 has 2 divisors, whose sum is σ = 91103621294. Its totient is φ = 91103621292.

The previous prime is 91103621267. The next prime is 91103621339. The reversal of 91103621293 is 39212630119.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90852810724 + 250810569 = 301418^2 + 15837^2 .

It is a cyclic number.

It is not a de Polignac number, because 91103621293 - 2⁵ = 91103621261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91103621243) 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, 45551810646 + 45551810647.

It is an arithmetic number, because the mean of its divisors is an integer number (45551810647).

Almost surely, 2^91103621293 is an apocalyptic number.

It is an amenable number.

91103621293 is a deficient number, since it is larger than the sum of its proper divisors (1).

91103621293 is an equidigital number, since it uses as much as digits as its factorization.

91103621293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 37.

The spelling of 91103621293 in words is "ninety-one billion, one hundred three million, six hundred twenty-one thousand, two hundred ninety-three".