1608163969 has 2 divisors, whose sum is σ = 1608163970. Its totient is φ = 1608163968.

The previous prime is 1608163961. The next prime is 1608164017. The reversal of 1608163969 is 9693618061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1598000625 + 10163344 = 39975^2 + 3188^2 .

It is a cyclic number.

It is not a de Polignac number, because 1608163969 - 2³ = 1608163961 is a prime.

It is a super-2 number, since 2×1608163969² = 5172382702379665922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1608163961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 804081984 + 804081985.

It is an arithmetic number, because the mean of its divisors is an integer number (804081985).

Almost surely, 2^1608163969 is an apocalyptic number.

It is an amenable number.

1608163969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1608163969 is an equidigital number, since it uses as much as digits as its factorization.

1608163969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 1608163969 is about 40101.9197670136. The cubic root of 1608163969 is about 1171.5930205711.

The spelling of 1608163969 in words is "one billion, six hundred eight million, one hundred sixty-three thousand, nine hundred sixty-nine".