163428389 has 2 divisors, whose sum is σ = 163428390. Its totient is φ = 163428388.

The previous prime is 163428319. The next prime is 163428401. The reversal of 163428389 is 983824361.

163428389 is nontrivially palindromic in base 15.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152152225 + 11276164 = 12335^2 + 3358^2 .

It is a cyclic number.

It is not a de Polignac number, because 163428389 - 2¹⁶ = 163362853 is a prime.

It is a super-2 number, since 2×163428389² = 53417676662270642, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163428319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81714194 + 81714195.

It is an arithmetic number, because the mean of its divisors is an integer number (81714195).

Almost surely, 2^163428389 is an apocalyptic number.

It is an amenable number.

163428389 is a deficient number, since it is larger than the sum of its proper divisors (1).

163428389 is an equidigital number, since it uses as much as digits as its factorization.

163428389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 44.

The square root of 163428389 is about 12783.9113341731. The cubic root of 163428389 is about 546.7336863021.

The spelling of 163428389 in words is "one hundred sixty-three million, four hundred twenty-eight thousand, three hundred eighty-nine".