91911629 has 2 divisors, whose sum is σ = 91911630. Its totient is φ = 91911628.

The previous prime is 91911581. The next prime is 91911641. The reversal of 91911629 is 92611919.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57078025 + 34833604 = 7555^2 + 5902^2 .

It is an emirp because it is prime and its reverse (92611919) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91911629 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 91911592 and 91911601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91911929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45955814 + 45955815.

It is an arithmetic number, because the mean of its divisors is an integer number (45955815).

Almost surely, 2^91911629 is an apocalyptic number.

It is an amenable number.

91911629 is a deficient number, since it is larger than the sum of its proper divisors (1).

91911629 is an equidigital number, since it uses as much as digits as its factorization.

91911629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8748, while the sum is 38.

The square root of 91911629 is about 9587.0552830366. The cubic root of 91911629 is about 451.2911543869.

The spelling of 91911629 in words is "ninety-one million, nine hundred eleven thousand, six hundred twenty-nine".