164404477 has 4 divisors (see below), whose sum is σ = 164875900. Its totient is φ = 163933056.

The previous prime is 164404469. The next prime is 164404489. The reversal of 164404477 is 774404461.

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

It can be written as a sum of positive squares in 2 ways, for example, as 95531076 + 68873401 = 9774^2 + 8299^2 .

It is a cyclic number.

It is not a de Polignac number, because 164404477 - 2³ = 164404469 is a prime.

It is a super-3 number, since 3×164404477³ (a number of 26 digits) contains 333 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 (164404417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235188 + ... + 235885.

It is an arithmetic number, because the mean of its divisors is an integer number (41218975).

Almost surely, 2^164404477 is an apocalyptic number.

It is an amenable number.

164404477 is a deficient number, since it is larger than the sum of its proper divisors (471423).

164404477 is an equidigital number, since it uses as much as digits as its factorization.

164404477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471422.

The product of its (nonzero) digits is 75264, while the sum is 37.

The square root of 164404477 is about 12822.0309233756. The cubic root of 164404477 is about 547.8199954463.

The spelling of 164404477 in words is "one hundred sixty-four million, four hundred four thousand, four hundred seventy-seven".