91682209 has 8 divisors (see below), whose sum is σ = 97474752. Its totient is φ = 86040240.

The previous prime is 91682203. The next prime is 91682231. The reversal of 91682209 is 90228619.

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

It is not a de Polignac number, because 91682209 - 2⁵ = 91682177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91682203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36387 + ... + 38824.

It is an arithmetic number, because the mean of its divisors is an integer number (12184344).

Almost surely, 2^91682209 is an apocalyptic number.

It is an amenable number.

91682209 is a deficient number, since it is larger than the sum of its proper divisors (5792543).

91682209 is a wasteful number, since it uses less digits than its factorization.

91682209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75287.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 91682209 is about 9575.0827150474. The cubic root of 91682209 is about 450.9153532616.

It can be divided in two parts, 9 and 1682209, that multiplied together give a square (15139881 = 3891²).

The spelling of 91682209 in words is "ninety-one million, six hundred eighty-two thousand, two hundred nine".