164395819 has 8 divisors (see below), whose sum is σ = 188245728. Its totient is φ = 140637120.

The previous prime is 164395817. The next prime is 164395841. The reversal of 164395819 is 918593461.

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 164395819 - 2¹ = 164395817 is a prime.

It is a super-2 number, since 2×164395819² = 54051970609361522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164395813) 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, 18892 + ... + 26185.

It is an arithmetic number, because the mean of its divisors is an integer number (23530716).

Almost surely, 2^164395819 is an apocalyptic number.

164395819 is a deficient number, since it is larger than the sum of its proper divisors (23849909).

164395819 is an equidigital number, since it uses as much as digits as its factorization.

164395819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45605.

The product of its digits is 233280, while the sum is 46.

The square root of 164395819 is about 12821.6932969090. The cubic root of 164395819 is about 547.8103786993.

The spelling of 164395819 in words is "one hundred sixty-four million, three hundred ninety-five thousand, eight hundred nineteen".