91380303913 has 2 divisors, whose sum is σ = 91380303914. Its totient is φ = 91380303912.

The previous prime is 91380303851. The next prime is 91380303919. The reversal of 91380303913 is 31930308319.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55024492329 + 36355811584 = 234573^2 + 190672^2 .

It is a cyclic number.

It is not a de Polignac number, because 91380303913 - 2⁹ = 91380303401 is a prime.

It is a super-2 number, since 2×91380303913² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (91380303919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45690151956 + 45690151957.

It is an arithmetic number, because the mean of its divisors is an integer number (45690151957).

Almost surely, 2^91380303913 is an apocalyptic number.

It is an amenable number.

91380303913 is a deficient number, since it is larger than the sum of its proper divisors (1).

91380303913 is an equidigital number, since it uses as much as digits as its factorization.

91380303913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 40.

The spelling of 91380303913 in words is "ninety-one billion, three hundred eighty million, three hundred three thousand, nine hundred thirteen".