1609117393 has 4 divisors (see below), whose sum is σ = 1732895668. Its totient is φ = 1485339120.

The previous prime is 1609117387. The next prime is 1609117417. The reversal of 1609117393 is 3937119061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3937119061 = 6079 ⋅647659.

It can be written as a sum of positive squares in 2 ways, for example, as 738100224 + 871017169 = 27168^2 + 29513^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1609117393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1609117193) 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, 61889118 + ... + 61889143.

It is an arithmetic number, because the mean of its divisors is an integer number (433223917).

Almost surely, 2^1609117393 is an apocalyptic number.

1609117393 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1609117393 is a deficient number, since it is larger than the sum of its proper divisors (123778275).

1609117393 is a wasteful number, since it uses less digits than its factorization.

1609117393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123778274.

The product of its (nonzero) digits is 30618, while the sum is 40.

The square root of 1609117393 is about 40113.8055163057. The cubic root of 1609117393 is about 1171.8245069639.

The spelling of 1609117393 in words is "one billion, six hundred nine million, one hundred seventeen thousand, three hundred ninety-three".