91236741149 has 2 divisors, whose sum is σ = 91236741150. Its totient is φ = 91236741148.

The previous prime is 91236741073. The next prime is 91236741151. The reversal of 91236741149 is 94114763219.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55562975524 + 35673765625 = 235718^2 + 188875^2 .

It is an emirp because it is prime and its reverse (94114763219) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91236741149 - 2²⁸ = 90968305693 is a prime.

Together with 91236741151, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91236741749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45618370574 + 45618370575.

It is an arithmetic number, because the mean of its divisors is an integer number (45618370575).

Almost surely, 2^91236741149 is an apocalyptic number.

It is an amenable number.

91236741149 is a deficient number, since it is larger than the sum of its proper divisors (1).

91236741149 is an equidigital number, since it uses as much as digits as its factorization.

91236741149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 47.

The spelling of 91236741149 in words is "ninety-one billion, two hundred thirty-six million, seven hundred forty-one thousand, one hundred forty-nine".