91312598203 has 2 divisors, whose sum is σ = 91312598204. Its totient is φ = 91312598202.

The previous prime is 91312598189. The next prime is 91312598317. The reversal of 91312598203 is 30289521319.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91312598203 - 2⁵ = 91312598171 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91312598203.

It is not a weakly prime, because it can be changed into another prime (91312098203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45656299101 + 45656299102.

It is an arithmetic number, because the mean of its divisors is an integer number (45656299102).

Almost surely, 2^91312598203 is an apocalyptic number.

91312598203 is a deficient number, since it is larger than the sum of its proper divisors (1).

91312598203 is an equidigital number, since it uses as much as digits as its factorization.

91312598203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 43.

The spelling of 91312598203 in words is "ninety-one billion, three hundred twelve million, five hundred ninety-eight thousand, two hundred three".