91084447204 has 9 divisors (see below), whose sum is σ = 159398838921. Its totient is φ = 45541921800.

The previous prime is 91084447193. The next prime is 91084447231. The reversal of 91084447204 is 40274448019.

It is a happy number.

The square root of 91084447204 is 301802.

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

It can be written as a sum of positive squares in only one way, i.e., 66410320804 + 24674126400 = 257702^2 + 157080^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 528154 + ... + 679054.

Almost surely, 2^91084447204 is an apocalyptic number.

91084447204 is the 301802-nd square number.

It is an amenable number.

91084447204 is a deficient number, since it is larger than the sum of its proper divisors (68314391717).

91084447204 is an frugal number, since it uses more digits than its factorization.

91084447204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301806 (or 150903 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 43.

The spelling of 91084447204 in words is "ninety-one billion, eighty-four million, four hundred forty-seven thousand, two hundred four".