801606109 has 4 divisors (see below), whose sum is σ = 803239200. Its totient is φ = 799973020.

The previous prime is 801606107. The next prime is 801606119. The reversal of 801606109 is 901606108.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 801606109 - 2¹ = 801606107 is a prime.

It is a super-2 number, since 2×801606109² = 1285144707972239762, 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 (801606107) 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, 815809 + ... + 816790.

It is an arithmetic number, because the mean of its divisors is an integer number (200809800).

Almost surely, 2^801606109 is an apocalyptic number.

It is an amenable number.

801606109 is a deficient number, since it is larger than the sum of its proper divisors (1633091).

801606109 is a wasteful number, since it uses less digits than its factorization.

801606109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1633090.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 801606109 is about 28312.6492755447. The cubic root of 801606109 is about 928.9385929100.

Subtracting 801606109 from its reverse (901606108), we obtain a palindrome (99999999).

The spelling of 801606109 in words is "eight hundred one million, six hundred six thousand, one hundred nine".