91670445 has 48 divisors (see below), whose sum is σ = 164436480. Its totient is φ = 47215872.

The previous prime is 91670419. The next prime is 91670461. The reversal of 91670445 is 54407619.

It is not a de Polignac number, because 91670445 - 2⁵ = 91670413 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 187992 + ... + 188478.

It is an arithmetic number, because the mean of its divisors is an integer number (3425760).

Almost surely, 2^91670445 is an apocalyptic number.

It is an amenable number.

91670445 is a deficient number, since it is larger than the sum of its proper divisors (72766035).

91670445 is a wasteful number, since it uses less digits than its factorization.

91670445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634 (or 631 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 91670445 is about 9574.4683925532. The cubic root of 91670445 is about 450.8960663677.

The spelling of 91670445 in words is "ninety-one million, six hundred seventy thousand, four hundred forty-five".