164433442 has 4 divisors (see below), whose sum is σ = 246650166. Its totient is φ = 82216720.

The previous prime is 164433403. The next prime is 164433443. The reversal of 164433442 is 244334461.

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

It can be written as a sum of positive squares in only one way, i.e., 140920641 + 23512801 = 11871^2 + 4849^2 .

It is a super-3 number, since 3×164433442³ (a number of 26 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (164433443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41108359 + ... + 41108362.

Almost surely, 2^164433442 is an apocalyptic number.

164433442 is a deficient number, since it is larger than the sum of its proper divisors (82216724).

164433442 is an equidigital number, since it uses as much as digits as its factorization.

164433442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82216723.

The product of its digits is 27648, while the sum is 31.

The square root of 164433442 is about 12823.1603748842. The cubic root of 164433442 is about 547.8521654429.

The spelling of 164433442 in words is "one hundred sixty-four million, four hundred thirty-three thousand, four hundred forty-two".