91275097 has 2 divisors, whose sum is σ = 91275098. Its totient is φ = 91275096.

The previous prime is 91275077. The next prime is 91275103. The reversal of 91275097 is 79057219.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58430736 + 32844361 = 7644^2 + 5731^2 .

It is a cyclic number.

It is not a de Polignac number, because 91275097 - 2¹⁹ = 90750809 is a prime.

It is a super-2 number, since 2×91275097² = 16662286664718818, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (91275007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45637548 + 45637549.

It is an arithmetic number, because the mean of its divisors is an integer number (45637549).

Almost surely, 2^91275097 is an apocalyptic number.

It is an amenable number.

91275097 is a deficient number, since it is larger than the sum of its proper divisors (1).

91275097 is an equidigital number, since it uses as much as digits as its factorization.

91275097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39690, while the sum is 40.

The square root of 91275097 is about 9553.8001339781. The cubic root of 91275097 is about 450.2469377190.

The spelling of 91275097 in words is "ninety-one million, two hundred seventy-five thousand, ninety-seven".