91139117 has 2 divisors, whose sum is σ = 91139118. Its totient is φ = 91139116.

The previous prime is 91139099. The next prime is 91139119. The reversal of 91139117 is 71193119.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84015556 + 7123561 = 9166^2 + 2669^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91139117 is a prime.

Together with 91139119, 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 (91139119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45569558 + 45569559.

It is an arithmetic number, because the mean of its divisors is an integer number (45569559).

Almost surely, 2^91139117 is an apocalyptic number.

It is an amenable number.

91139117 is a deficient number, since it is larger than the sum of its proper divisors (1).

91139117 is an equidigital number, since it uses as much as digits as its factorization.

91139117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1701, while the sum is 32.

The square root of 91139117 is about 9546.6809415629. The cubic root of 91139117 is about 450.0232366602.

The spelling of 91139117 in words is "ninety-one million, one hundred thirty-nine thousand, one hundred seventeen".