91673305 has 8 divisors (see below), whose sum is σ = 112083912. Its totient is φ = 71954688.

The previous prime is 91673303. The next prime is 91673311. The reversal of 91673305 is 50337619.

It can be written as a sum of positive squares in 4 ways, for example, as 31393609 + 60279696 = 5603^2 + 7764^2 .

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 91673305 - 2¹ = 91673303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91673303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172704 + ... + 173233.

It is an arithmetic number, because the mean of its divisors is an integer number (14010489).

Almost surely, 2^91673305 is an apocalyptic number.

It is an amenable number.

91673305 is a deficient number, since it is larger than the sum of its proper divisors (20410607).

91673305 is a wasteful number, since it uses less digits than its factorization.

91673305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345995.

The product of its (nonzero) digits is 17010, while the sum is 34.

The square root of 91673305 is about 9574.6177469390. The cubic root of 91673305 is about 450.9007554447.

The spelling of 91673305 in words is "ninety-one million, six hundred seventy-three thousand, three hundred five".