91471678 has 8 divisors (see below), whose sum is σ = 137248920. Its totient is φ = 45722040.

The previous prime is 91471673. The next prime is 91471687. The reversal of 91471678 is 87617419.

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

It is a super-2 number, since 2×91471678² = 16734135752271368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91471673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6928 + ... + 15196.

It is an arithmetic number, because the mean of its divisors is an integer number (17156115).

Almost surely, 2^91471678 is an apocalyptic number.

91471678 is a deficient number, since it is larger than the sum of its proper divisors (45777242).

91471678 is a wasteful number, since it uses less digits than its factorization.

91471678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13802.

The product of its digits is 84672, while the sum is 43.

The square root of 91471678 is about 9564.0827056232. The cubic root of 91471678 is about 450.5699412186.

The spelling of 91471678 in words is "ninety-one million, four hundred seventy-one thousand, six hundred seventy-eight".