164391086 has 8 divisors (see below), whose sum is σ = 248528640. Its totient is φ = 81548208.

The previous prime is 164391083. The next prime is 164391091. The reversal of 164391086 is 680193461.

164391086 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164391083) 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, 323351 + ... + 323858.

It is an arithmetic number, because the mean of its divisors is an integer number (31066080).

Almost surely, 2^164391086 is an apocalyptic number.

164391086 is a deficient number, since it is larger than the sum of its proper divisors (84137554).

164391086 is a wasteful number, since it uses less digits than its factorization.

164391086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647338.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 164391086 is about 12821.5087255752. The cubic root of 164391086 is about 547.8051214460.

It can be divided in two parts, 1643 and 91086, that added together give a palindrome (92729).

The spelling of 164391086 in words is "one hundred sixty-four million, three hundred ninety-one thousand, eighty-six".