91718645 has 8 divisors (see below), whose sum is σ = 111705504. Its totient is φ = 72279504.

The previous prime is 91718629. The next prime is 91718647. The reversal of 91718645 is 54681719.

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

It is a cyclic number.

It is not a de Polignac number, because 91718645 - 2⁴ = 91718629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91718647) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 136559 + ... + 137228.

It is an arithmetic number, because the mean of its divisors is an integer number (13963188).

Almost surely, 2^91718645 is an apocalyptic number.

It is an amenable number.

91718645 is a deficient number, since it is larger than the sum of its proper divisors (19986859).

91718645 is a wasteful number, since it uses less digits than its factorization.

91718645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273859.

The product of its digits is 60480, while the sum is 41.

The square root of 91718645 is about 9576.9851727984. The cubic root of 91718645 is about 450.9750790470.

The spelling of 91718645 in words is "ninety-one million, seven hundred eighteen thousand, six hundred forty-five".