164484391 has 4 divisors (see below), whose sum is σ = 164777112. Its totient is φ = 164191672.

The previous prime is 164484323. The next prime is 164484409. The reversal of 164484391 is 193484461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 164484391 - 2¹¹ = 164482343 is a prime.

It is a super-2 number, since 2×164484391² = 54110229765281762, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164484301) 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, 145516 + ... + 146641.

It is an arithmetic number, because the mean of its divisors is an integer number (41194278).

Almost surely, 2^164484391 is an apocalyptic number.

164484391 is a deficient number, since it is larger than the sum of its proper divisors (292721).

164484391 is an equidigital number, since it uses as much as digits as its factorization.

164484391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292720.

The product of its digits is 82944, while the sum is 40.

The square root of 164484391 is about 12825.1468217717. The cubic root of 164484391 is about 547.9087428181.

The spelling of 164484391 in words is "one hundred sixty-four million, four hundred eighty-four thousand, three hundred ninety-one".