164442947 has 2 divisors, whose sum is σ = 164442948. Its totient is φ = 164442946.

The previous prime is 164442937. The next prime is 164442973. The reversal of 164442947 is 749244461.

164442947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164442947 - 2⁴ = 164442931 is a prime.

It is not a weakly prime, because it can be changed into another prime (164442907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82221473 + 82221474.

It is an arithmetic number, because the mean of its divisors is an integer number (82221474).

Almost surely, 2^164442947 is an apocalyptic number.

164442947 is a deficient number, since it is larger than the sum of its proper divisors (1).

164442947 is an equidigital number, since it uses as much as digits as its factorization.

164442947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 41.

The square root of 164442947 is about 12823.5309879923. The cubic root of 164442947 is about 547.8627213543.

It can be divided in two parts, 16444 and 2947, that added together give a palindrome (19391).

The spelling of 164442947 in words is "one hundred sixty-four million, four hundred forty-two thousand, nine hundred forty-seven".