91739323225 has 27 divisors (see below), whose sum is σ = 125061132511. Its totient is φ = 66707392400.

The previous prime is 91739323213. The next prime is 91739323259. The reversal of 91739323225 is 52232393719.

The square root of 91739323225 is 302885.

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., 33026156361 + 58713166864 = 181731^2 + 242308^2 .

It is not a de Polignac number, because 91739323225 - 2³¹ = 89591839577 is a prime.

It is a super-2 number, since 2×91739323225² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 16655922 + ... + 16661428.

Almost surely, 2^91739323225 is an apocalyptic number.

91739323225 is the 302885-th square number.

91739323225 is the 151443-rd centered octagonal number.

It is an amenable number.

91739323225 is a deficient number, since it is larger than the sum of its proper divisors (33321809286).

91739323225 is an frugal number, since it uses more digits than its factorization.

91739323225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11046 (or 5523 counting only the distinct ones).

The product of its digits is 612360, while the sum is 46.

The spelling of 91739323225 in words is "ninety-one billion, seven hundred thirty-nine million, three hundred twenty-three thousand, two hundred twenty-five".