91125017 has 2 divisors, whose sum is σ = 91125018. Its totient is φ = 91125016.

The previous prime is 91124983. The next prime is 91125031. The reversal of 91125017 is 71052119.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90992521 + 132496 = 9539^2 + 364^2 .

It is a cyclic number.

It is not a de Polignac number, because 91125017 - 2¹⁸ = 90862873 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91125077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45562508 + 45562509.

It is an arithmetic number, because the mean of its divisors is an integer number (45562509).

Almost surely, 2^91125017 is an apocalyptic number.

It is an amenable number.

91125017 is a deficient number, since it is larger than the sum of its proper divisors (1).

91125017 is an equidigital number, since it uses as much as digits as its factorization.

91125017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630, while the sum is 26.

The square root of 91125017 is about 9545.9424364491. The cubic root of 91125017 is about 450.0000279835. Note that the first 4 decimals are identical.

The spelling of 91125017 in words is "ninety-one million, one hundred twenty-five thousand, seventeen".