164163409 has 2 divisors, whose sum is σ = 164163410. Its totient is φ = 164163408.

The previous prime is 164163371. The next prime is 164163427. The reversal of 164163409 is 904361461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133471809 + 30691600 = 11553^2 + 5540^2 .

It is a cyclic number.

It is not a de Polignac number, because 164163409 - 2¹³ = 164155217 is a prime.

It is not a weakly prime, because it can be changed into another prime (164163469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82081704 + 82081705.

It is an arithmetic number, because the mean of its divisors is an integer number (82081705).

Almost surely, 2^164163409 is an apocalyptic number.

It is an amenable number.

164163409 is a deficient number, since it is larger than the sum of its proper divisors (1).

164163409 is an equidigital number, since it uses as much as digits as its factorization.

164163409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 164163409 is about 12812.6269359566. The cubic root of 164163409 is about 547.5521064091.

The spelling of 164163409 in words is "one hundred sixty-four million, one hundred sixty-three thousand, four hundred nine".