91796647 has 4 divisors (see below), whose sum is σ = 92828160. Its totient is φ = 90765136.

The previous prime is 91796599. The next prime is 91796671. The reversal of 91796647 is 74669719.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91796647 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91796647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91791647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 515623 + ... + 515800.

It is an arithmetic number, because the mean of its divisors is an integer number (23207040).

Almost surely, 2^91796647 is an apocalyptic number.

91796647 is a deficient number, since it is larger than the sum of its proper divisors (1031513).

91796647 is a wasteful number, since it uses less digits than its factorization.

91796647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031512.

The product of its digits is 571536, while the sum is 49.

The square root of 91796647 is about 9581.0566745010. The cubic root of 91796647 is about 451.1028865419.

The spelling of 91796647 in words is "ninety-one million, seven hundred ninety-six thousand, six hundred forty-seven".