91070017 has 2 divisors, whose sum is σ = 91070018. Its totient is φ = 91070016.

The previous prime is 91069997. The next prime is 91070027. The reversal of 91070017 is 71007019.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81558961 + 9511056 = 9031^2 + 3084^2 .

It is a cyclic number.

It is not a de Polignac number, because 91070017 - 2¹⁵ = 91037249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91069973 and 91070000.

It is not a weakly prime, because it can be changed into another prime (91070027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45535008 + 45535009.

It is an arithmetic number, because the mean of its divisors is an integer number (45535009).

Almost surely, 2^91070017 is an apocalyptic number.

It is an amenable number.

91070017 is a deficient number, since it is larger than the sum of its proper divisors (1).

91070017 is an equidigital number, since it uses as much as digits as its factorization.

91070017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 441, while the sum is 25.

The square root of 91070017 is about 9543.0611964925. The cubic root of 91070017 is about 449.9094747946.

The spelling of 91070017 in words is "ninety-one million, seventy thousand, seventeen".