91294018201 has 9 divisors (see below), whose sum is σ = 91631552149. Its totient is φ = 90957726364.

The previous prime is 91294018187. The next prime is 91294018259. The reversal of 91294018201 is 10281049219.

The square root of 91294018201 is 302149.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 91294018201 - 2⁵ = 91294018169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91294018601) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 141103260 + ... + 141103906.

Almost surely, 2^91294018201 is an apocalyptic number.

91294018201 is the 302149-th square number.

91294018201 is the 151075-th centered octagonal number.

It is an amenable number.

91294018201 is a deficient number, since it is larger than the sum of its proper divisors (337533948).

91294018201 is an frugal number, since it uses more digits than its factorization.

91294018201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2228 (or 1114 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 37.

The spelling of 91294018201 in words is "ninety-one billion, two hundred ninety-four million, eighteen thousand, two hundred one".