210164389 has 2 divisors, whose sum is σ = 210164390. Its totient is φ = 210164388.

The previous prime is 210164359. The next prime is 210164441. The reversal of 210164389 is 983461012.

210164389 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., 208802500 + 1361889 = 14450^2 + 1167^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210164389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210164309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105082194 + 105082195.

It is an arithmetic number, because the mean of its divisors is an integer number (105082195).

Almost surely, 2^210164389 is an apocalyptic number.

It is an amenable number.

210164389 is a deficient number, since it is larger than the sum of its proper divisors (1).

210164389 is an equidigital number, since it uses as much as digits as its factorization.

210164389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 210164389 is about 14497.0475959762. The cubic root of 210164389 is about 594.5472525038.

The spelling of 210164389 in words is "two hundred ten million, one hundred sixty-four thousand, three hundred eighty-nine".