1609817473 has 8 divisors (see below), whose sum is σ = 1769571936. Its totient is φ = 1452297600.

The previous prime is 1609817471. The next prime is 1609817491. The reversal of 1609817473 is 3747189061.

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

It is a cyclic number.

It is not a de Polignac number, because 1609817473 - 2¹ = 1609817471 is a prime.

It is a super-2 number, since 2×1609817473² = 5183024592752211458, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1609817471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 557136 + ... + 560017.

It is an arithmetic number, because the mean of its divisors is an integer number (221196492).

Almost surely, 2^1609817473 is an apocalyptic number.

It is an amenable number.

1609817473 is a deficient number, since it is larger than the sum of its proper divisors (159754463).

1609817473 is a wasteful number, since it uses less digits than its factorization.

1609817473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117295.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 1609817473 is about 40122.5307402213. The cubic root of 1609817473 is about 1171.9944245348.

The spelling of 1609817473 in words is "one billion, six hundred nine million, eight hundred seventeen thousand, four hundred seventy-three".