91789265 has 8 divisors (see below), whose sum is σ = 110849640. Its totient is φ = 72963072.

The previous prime is 91789237. The next prime is 91789289. The reversal of 91789265 is 56298719.

It can be written as a sum of positive squares in 4 ways, for example, as 8596624 + 83192641 = 2932^2 + 9121^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91789265 - 2¹⁶ = 91723729 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57680 + ... + 59249.

It is an arithmetic number, because the mean of its divisors is an integer number (13856205).

Almost surely, 2^91789265 is an apocalyptic number.

It is an amenable number.

91789265 is a deficient number, since it is larger than the sum of its proper divisors (19060375).

91789265 is a wasteful number, since it uses less digits than its factorization.

91789265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117091.

The product of its digits is 272160, while the sum is 47.

The square root of 91789265 is about 9580.6714274105. The cubic root of 91789265 is about 451.0907941221.

The spelling of 91789265 in words is "ninety-one million, seven hundred eighty-nine thousand, two hundred sixty-five".