91065001 has 2 divisors, whose sum is σ = 91065002. Its totient is φ = 91065000.

The previous prime is 91064999. The next prime is 91065053. The reversal of 91065001 is 10056019.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63186601 + 27878400 = 7949^2 + 5280^2 .

It is a cyclic number.

It is not a de Polignac number, because 91065001 - 2¹ = 91064999 is a prime.

Together with 91064999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (91065061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45532500 + 45532501.

It is an arithmetic number, because the mean of its divisors is an integer number (45532501).

Almost surely, 2^91065001 is an apocalyptic number.

It is an amenable number.

91065001 is a deficient number, since it is larger than the sum of its proper divisors (1).

91065001 is an equidigital number, since it uses as much as digits as its factorization.

91065001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 91065001 is about 9542.7983841219. The cubic root of 91065001 is about 449.9012145299.

The spelling of 91065001 in words is "ninety-one million, sixty-five thousand, one".