91628673 has 8 divisors (see below), whose sum is σ = 122351136. Its totient is φ = 60996000.

The previous prime is 91628639. The next prime is 91628681. The reversal of 91628673 is 37682619.

It is a happy number.

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

It is not a de Polignac number, because 91628673 - 2⁶ = 91628609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91628683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20028 + ... + 24173.

It is an arithmetic number, because the mean of its divisors is an integer number (15293892).

Almost surely, 2^91628673 is an apocalyptic number.

It is an amenable number.

91628673 is a deficient number, since it is larger than the sum of its proper divisors (30722463).

91628673 is a wasteful number, since it uses less digits than its factorization.

91628673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44895.

The product of its digits is 108864, while the sum is 42.

The square root of 91628673 is about 9572.2867173941. The cubic root of 91628673 is about 450.8275684926.

The spelling of 91628673 in words is "ninety-one million, six hundred twenty-eight thousand, six hundred seventy-three".