91860673 has 6 divisors (see below), whose sum is σ = 97582406. Its totient is φ = 86456832.

The previous prime is 91860667. The next prime is 91860683. The reversal of 91860673 is 37606819.

It can be written as a sum of positive squares in 3 ways, for example, as 63473089 + 28387584 = 7967^2 + 5328^2 .

It is not a de Polignac number, because 91860673 - 2⁵ = 91860641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91860683) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 158640 + ... + 159217.

Almost surely, 2^91860673 is an apocalyptic number.

It is an amenable number.

91860673 is a deficient number, since it is larger than the sum of its proper divisors (5721733).

91860673 is a wasteful number, since it uses less digits than its factorization.

91860673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317891 (or 317874 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 91860673 is about 9584.3973728138. The cubic root of 91860673 is about 451.2077400489.

The spelling of 91860673 in words is "ninety-one million, eight hundred sixty thousand, six hundred seventy-three".