91009430933 has 2 divisors, whose sum is σ = 91009430934. Its totient is φ = 91009430932.

The previous prime is 91009430879. The next prime is 91009430947. The reversal of 91009430933 is 33903490019.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86599541284 + 4409889649 = 294278^2 + 66407^2 .

It is a cyclic number.

It is not a de Polignac number, because 91009430933 - 2¹⁴ = 91009414549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91009432933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45504715466 + 45504715467.

It is an arithmetic number, because the mean of its divisors is an integer number (45504715467).

Almost surely, 2^91009430933 is an apocalyptic number.

It is an amenable number.

91009430933 is a deficient number, since it is larger than the sum of its proper divisors (1).

91009430933 is an equidigital number, since it uses as much as digits as its factorization.

91009430933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78732, while the sum is 41.

The spelling of 91009430933 in words is "ninety-one billion, nine million, four hundred thirty thousand, nine hundred thirty-three".