91000100903 has 2 divisors, whose sum is σ = 91000100904. Its totient is φ = 91000100902.

The previous prime is 91000100897. The next prime is 91000100951. The reversal of 91000100903 is 30900100019.

It is a weak prime.

It is an emirp because it is prime and its reverse (30900100019) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91000100903 - 2⁶ = 91000100839 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91000100963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45500050451 + 45500050452.

It is an arithmetic number, because the mean of its divisors is an integer number (45500050452).

Almost surely, 2^91000100903 is an apocalyptic number.

91000100903 is a deficient number, since it is larger than the sum of its proper divisors (1).

91000100903 is an equidigital number, since it uses as much as digits as its factorization.

91000100903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243, while the sum is 23.

The spelling of 91000100903 in words is "ninety-one billion, one hundred thousand, nine hundred three".