91064161 has 4 divisors (see below), whose sum is σ = 91124500. Its totient is φ = 91003824.

The previous prime is 91064119. The next prime is 91064167. The reversal of 91064161 is 16146019.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67240000 + 23824161 = 8200^2 + 4881^2 .

It is a cyclic number.

It is not a de Polignac number, because 91064161 - 2¹¹ = 91062113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91064167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27846 + ... + 30943.

It is an arithmetic number, because the mean of its divisors is an integer number (22781125).

Almost surely, 2^91064161 is an apocalyptic number.

It is an amenable number.

91064161 is a deficient number, since it is larger than the sum of its proper divisors (60339).

91064161 is a wasteful number, since it uses less digits than its factorization.

91064161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60338.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 91064161 is about 9542.7543717734. The cubic root of 91064161 is about 449.8998312023.

The spelling of 91064161 in words is "ninety-one million, sixty-four thousand, one hundred sixty-one".