91125071 has 2 divisors, whose sum is σ = 91125072. Its totient is φ = 91125070.

The previous prime is 91125059. The next prime is 91125077. The reversal of 91125071 is 17052119.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91125071 - 2¹⁸ = 90862927 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91125071.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91125077) 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, 45562535 + 45562536.

It is an arithmetic number, because the mean of its divisors is an integer number (45562536).

Almost surely, 2^91125071 is an apocalyptic number.

91125071 is a deficient number, since it is larger than the sum of its proper divisors (1).

91125071 is an equidigital number, since it uses as much as digits as its factorization.

91125071 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 91125071 is about 9545.9452648756. The cubic root of 91125071 is about 450.0001168724. Note that the first 3 decimals are identical.

The spelling of 91125071 in words is "ninety-one million, one hundred twenty-five thousand, seventy-one".