91573340941 has 2 divisors, whose sum is σ = 91573340942. Its totient is φ = 91573340940.

The previous prime is 91573340839. The next prime is 91573340959. The reversal of 91573340941 is 14904337519.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90787716100 + 785624841 = 301310^2 + 28029^2 .

It is an emirp because it is prime and its reverse (14904337519) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91573340941 - 2⁷ = 91573340813 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91573340891 and 91573340900.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91573340981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45786670470 + 45786670471.

It is an arithmetic number, because the mean of its divisors is an integer number (45786670471).

Almost surely, 2^91573340941 is an apocalyptic number.

It is an amenable number.

91573340941 is a deficient number, since it is larger than the sum of its proper divisors (1).

91573340941 is an equidigital number, since it uses as much as digits as its factorization.

91573340941 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 46.

The spelling of 91573340941 in words is "ninety-one billion, five hundred seventy-three million, three hundred forty thousand, nine hundred forty-one".