1609161838 has 8 divisors (see below), whose sum is σ = 2420699832. Its totient is φ = 802261896.

The previous prime is 1609161803. The next prime is 1609161839. The reversal of 1609161838 is 8381619061.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1609161794 and 1609161803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1609161839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1158645 + ... + 1160032.

It is an arithmetic number, because the mean of its divisors is an integer number (302587479).

Almost surely, 2^1609161838 is an apocalyptic number.

1609161838 is a deficient number, since it is larger than the sum of its proper divisors (811537994).

1609161838 is a wasteful number, since it uses less digits than its factorization.

1609161838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2319026.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 1609161838 is about 40114.3594988129. The cubic root of 1609161838 is about 1171.8352957480.

The spelling of 1609161838 in words is "one billion, six hundred nine million, one hundred sixty-one thousand, eight hundred thirty-eight".