1659009109 has 8 divisors (see below), whose sum is σ = 1675520480. Its totient is φ = 1642573296.

The previous prime is 1659009097. The next prime is 1659009137. The reversal of 1659009109 is 9019009561.

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 1659009109 - 2¹¹ = 1659007061 is a prime.

It is a super-2 number, since 2×1659009109² = 5504622447489947762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1659079109) 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, 25762 + ... + 63100.

It is an arithmetic number, because the mean of its divisors is an integer number (209440060).

Almost surely, 2^1659009109 is an apocalyptic number.

It is an amenable number.

1659009109 is a deficient number, since it is larger than the sum of its proper divisors (16511371).

1659009109 is a wasteful number, since it uses less digits than its factorization.

1659009109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37779.

The product of its (nonzero) digits is 21870, while the sum is 40.

The square root of 1659009109 is about 40730.9355281707. The cubic root of 1659009109 is about 1183.8125057398.

The spelling of 1659009109 in words is "one billion, six hundred fifty-nine million, nine thousand, one hundred nine".