164467421 has 4 divisors (see below), whose sum is σ = 164748192. Its totient is φ = 164186652.

The previous prime is 164467417. The next prime is 164467423. The reversal of 164467421 is 124764461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 164467421 - 2² = 164467417 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 (164467423) 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, 139505 + ... + 140678.

It is an arithmetic number, because the mean of its divisors is an integer number (41187048).

Almost surely, 2^164467421 is an apocalyptic number.

It is an amenable number.

164467421 is a deficient number, since it is larger than the sum of its proper divisors (280771).

164467421 is an equidigital number, since it uses as much as digits as its factorization.

164467421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280770.

The product of its digits is 32256, while the sum is 35.

The square root of 164467421 is about 12824.4852138400. The cubic root of 164467421 is about 547.8898994270.

The spelling of 164467421 in words is "one hundred sixty-four million, four hundred sixty-seven thousand, four hundred twenty-one".