1640109 has 8 divisors (see below), whose sum is σ = 2315520. Its totient is φ = 1029056.

The previous prime is 1640083. The next prime is 1640131. The reversal of 1640109 is 9010461.

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 1640109 - 2⁵ = 1640077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640189) 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, 16029 + ... + 16130.

It is an arithmetic number, because the mean of its divisors is an integer number (289440).

2^1640109 is an apocalyptic number.

It is an amenable number.

1640109 is a deficient number, since it is larger than the sum of its proper divisors (675411).

1640109 is a wasteful number, since it uses less digits than its factorization.

1640109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32179.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 1640109 is about 1280.6674041296. The cubic root of 1640109 is about 117.9299833601.

The spelling of 1640109 in words is "one million, six hundred forty thousand, one hundred nine".