164442937 has 2 divisors, whose sum is σ = 164442938. Its totient is φ = 164442936.

The previous prime is 164442931. The next prime is 164442947. The reversal of 164442937 is 739244461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93141801 + 71301136 = 9651^2 + 8444^2 .

It is a cyclic number.

It is not a de Polignac number, because 164442937 - 2⁷ = 164442809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 164442937.

It is not a weakly prime, because it can be changed into another prime (164442931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82221468 + 82221469.

It is an arithmetic number, because the mean of its divisors is an integer number (82221469).

Almost surely, 2^164442937 is an apocalyptic number.

It is an amenable number.

164442937 is a deficient number, since it is larger than the sum of its proper divisors (1).

164442937 is an equidigital number, since it uses as much as digits as its factorization.

164442937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 40.

The square root of 164442937 is about 12823.5305980841. The cubic root of 164442937 is about 547.8627102488.

The spelling of 164442937 in words is "one hundred sixty-four million, four hundred forty-two thousand, nine hundred thirty-seven".