8161911 has 32 divisors (see below), whose sum is σ = 12680640. Its totient is φ = 5184000.

The previous prime is 8161903. The next prime is 8161913. The reversal of 8161911 is 1191618.

It is not a de Polignac number, because 8161911 - 2³ = 8161903 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

8161911 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8161913) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80761 + ... + 80861.

It is an arithmetic number, because the mean of its divisors is an integer number (396270).

Almost surely, 2^8161911 is an apocalyptic number.

8161911 is a deficient number, since it is larger than the sum of its proper divisors (4518729).

8161911 is a wasteful number, since it uses less digits than its factorization.

8161911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224 (or 218 counting only the distinct ones).

The product of its digits is 432, while the sum is 27.

The square root of 8161911 is about 2856.9058437407. The cubic root of 8161911 is about 201.3402568291.

The spelling of 8161911 in words is "eight million, one hundred sixty-one thousand, nine hundred eleven".