164238673 has 2 divisors, whose sum is σ = 164238674. Its totient is φ = 164238672.

The previous prime is 164238643. The next prime is 164238689. The reversal of 164238673 is 376832461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118635664 + 45603009 = 10892^2 + 6753^2 .

It is a cyclic number.

It is not a de Polignac number, because 164238673 - 2¹³ = 164230481 is a prime.

It is not a weakly prime, because it can be changed into another prime (164238643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82119336 + 82119337.

It is an arithmetic number, because the mean of its divisors is an integer number (82119337).

Almost surely, 2^164238673 is an apocalyptic number.

It is an amenable number.

164238673 is a deficient number, since it is larger than the sum of its proper divisors (1).

164238673 is an equidigital number, since it uses as much as digits as its factorization.

164238673 is an evil number, because the sum of its binary digits is even.

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

The square root of 164238673 is about 12815.5637019992. The cubic root of 164238673 is about 547.6357723644.

The spelling of 164238673 in words is "one hundred sixty-four million, two hundred thirty-eight thousand, six hundred seventy-three".