801181109 has 4 divisors (see below), whose sum is σ = 813139104. Its totient is φ = 789223116.

The previous prime is 801181067. The next prime is 801181153. The reversal of 801181109 is 901181108.

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 801181109 - 2¹⁶ = 801115573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801181169) 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, 5978897 + ... + 5979030.

It is an arithmetic number, because the mean of its divisors is an integer number (203284776).

Almost surely, 2^801181109 is an apocalyptic number.

It is an amenable number.

801181109 is a deficient number, since it is larger than the sum of its proper divisors (11957995).

801181109 is a wasteful number, since it uses less digits than its factorization.

801181109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11957994.

The product of its (nonzero) digits is 576, while the sum is 29.

The square root of 801181109 is about 28305.1428012649. The cubic root of 801181109 is about 928.7743939390.

Subtracting 801181109 from its reverse (901181108), we obtain a palindrome (99999999).

The spelling of 801181109 in words is "eight hundred one million, one hundred eighty-one thousand, one hundred nine".