8811381 has 4 divisors (see below), whose sum is σ = 11748512. Its totient is φ = 5874252.

The previous prime is 8811373. The next prime is 8811391. The reversal of 8811381 is 1831188.

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 not a de Polignac number, because 8811381 - 2³ = 8811373 is a prime.

It is a super-2 number, since 2×8811381² = 155280870254322, which contains 22 as substring.

It is a Duffinian number.

8811381 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8811301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1468561 + ... + 1468566.

It is an arithmetic number, because the mean of its divisors is an integer number (2937128).

Almost surely, 2^8811381 is an apocalyptic number.

It is an amenable number.

8811381 is a deficient number, since it is larger than the sum of its proper divisors (2937131).

8811381 is a wasteful number, since it uses less digits than its factorization.

8811381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2937130.

The product of its digits is 1536, while the sum is 30.

The square root of 8811381 is about 2968.3970421761. The cubic root of 8811381 is about 206.5449876286.

The spelling of 8811381 in words is "eight million, eight hundred eleven thousand, three hundred eighty-one".