1609678393 has 2 divisors, whose sum is σ = 1609678394. Its totient is φ = 1609678392.

The previous prime is 1609678381. The next prime is 1609678429. The reversal of 1609678393 is 3938769061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1609373689 + 304704 = 40117^2 + 552^2 .

It is a cyclic number.

It is not a de Polignac number, because 1609678393 - 2¹⁷ = 1609547321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1609678393.

It is not a weakly prime, because it can be changed into another prime (1609678313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 804839196 + 804839197.

It is an arithmetic number, because the mean of its divisors is an integer number (804839197).

Almost surely, 2^1609678393 is an apocalyptic number.

It is an amenable number.

1609678393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1609678393 is an equidigital number, since it uses as much as digits as its factorization.

1609678393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1469664, while the sum is 52.

The square root of 1609678393 is about 40120.7975120136. The cubic root of 1609678393 is about 1171.9606721205.

The spelling of 1609678393 in words is "one billion, six hundred nine million, six hundred seventy-eight thousand, three hundred ninety-three".