91797201 has 6 divisors (see below), whose sum is σ = 132595970. Its totient is φ = 61198128.

The previous prime is 91797197. The next prime is 91797203. The reversal of 91797201 is 10279719.

It can be written as a sum of positive squares in only one way, i.e., 75272976 + 16524225 = 8676^2 + 4065^2 .

It is not a de Polignac number, because 91797201 - 2² = 91797197 is a prime.

It is a super-2 number, since 2×91797201² = 16853452222868802, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (91797203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5099836 + ... + 5099853.

Almost surely, 2^91797201 is an apocalyptic number.

It is an amenable number.

91797201 is a deficient number, since it is larger than the sum of its proper divisors (40798769).

91797201 is a wasteful number, since it uses less digits than its factorization.

91797201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10199695 (or 10199692 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 36.

The square root of 91797201 is about 9581.0855856735. The cubic root of 91797201 is about 451.1037940206.

The spelling of 91797201 in words is "ninety-one million, seven hundred ninety-seven thousand, two hundred one".