1608354389 has 4 divisors (see below), whose sum is σ = 1693004640. Its totient is φ = 1523704140.

The previous prime is 1608354383. The next prime is 1608354421. The reversal of 1608354389 is 9834538061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1608354389 - 2⁸ = 1608354133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1608354383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42325097 + ... + 42325134.

It is an arithmetic number, because the mean of its divisors is an integer number (423251160).

Almost surely, 2^1608354389 is an apocalyptic number.

1608354389 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1608354389 is a deficient number, since it is larger than the sum of its proper divisors (84650251).

1608354389 is an equidigital number, since it uses as much as digits as its factorization.

1608354389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84650250.

The product of its (nonzero) digits is 622080, while the sum is 47.

The square root of 1608354389 is about 40104.2938972874. The cubic root of 1608354389 is about 1171.6392608680.

The spelling of 1608354389 in words is "one billion, six hundred eight million, three hundred fifty-four thousand, three hundred eighty-nine".