1609312319 has 2 divisors, whose sum is σ = 1609312320. Its totient is φ = 1609312318.

The previous prime is 1609312307. The next prime is 1609312339. The reversal of 1609312319 is 9132139061.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1609312319 - 2⁴ = 1609312303 is a prime.

It is a super-2 number, since 2×1609312319² = 5179772280170315522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1609312339) 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 as a sum of consecutive naturals, namely, 804656159 + 804656160.

It is an arithmetic number, because the mean of its divisors is an integer number (804656160).

Almost surely, 2^1609312319 is an apocalyptic number.

1609312319 is a deficient number, since it is larger than the sum of its proper divisors (1).

1609312319 is an equidigital number, since it uses as much as digits as its factorization.

1609312319 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 1609312319 is about 40116.2351050046. The cubic root of 1609312319 is about 1171.8718227247.

The spelling of 1609312319 in words is "one billion, six hundred nine million, three hundred twelve thousand, three hundred nineteen".