164498821 has 4 divisors (see below), whose sum is σ = 164770432. Its totient is φ = 164227212.

The previous prime is 164498813. The next prime is 164498833. The reversal of 164498821 is 128894461.

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 164498821 - 2³ = 164498813 is a prime.

It is a super-2 number, since 2×164498821² = 54119724220780082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164498891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134895 + ... + 136108.

It is an arithmetic number, because the mean of its divisors is an integer number (41192608).

Almost surely, 2^164498821 is an apocalyptic number.

It is an amenable number.

164498821 is a deficient number, since it is larger than the sum of its proper divisors (271611).

164498821 is an equidigital number, since it uses as much as digits as its factorization.

164498821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271610.

The product of its digits is 110592, while the sum is 43.

The square root of 164498821 is about 12825.7093760930. The cubic root of 164498821 is about 547.9247647882.

The spelling of 164498821 in words is "one hundred sixty-four million, four hundred ninety-eight thousand, eight hundred twenty-one".