164211409 has 2 divisors, whose sum is σ = 164211410. Its totient is φ = 164211408.

The previous prime is 164211401. The next prime is 164211461. The reversal of 164211409 is 904112461.

164211409 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 can be written as a sum of positive squares in only one way, i.e., 131033809 + 33177600 = 11447^2 + 5760^2 .

It is a cyclic number.

It is not a de Polignac number, because 164211409 - 2³ = 164211401 is a prime.

It is not a weakly prime, because it can be changed into another prime (164211401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82105704 + 82105705.

It is an arithmetic number, because the mean of its divisors is an integer number (82105705).

Almost surely, 2^164211409 is an apocalyptic number.

It is an amenable number.

164211409 is a deficient number, since it is larger than the sum of its proper divisors (1).

164211409 is an equidigital number, since it uses as much as digits as its factorization.

164211409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 164211409 is about 12814.4999512271. The cubic root of 164211409 is about 547.6054677521.

The spelling of 164211409 in words is "one hundred sixty-four million, two hundred eleven thousand, four hundred nine".