8611691 has 6 divisors (see below), whose sum is σ = 9465876. Its totient is φ = 7828700.

The previous prime is 8611679. The next prime is 8611697. The reversal of 8611691 is 1961168.

It is a de Polignac number, because none of the positive numbers 2^k-8611691 is a prime.

It is a super-2 number, since 2×8611691² = 148322443758962, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8611697) 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 5 ways as a sum of consecutive naturals, for example, 35465 + ... + 35706.

It is an arithmetic number, because the mean of its divisors is an integer number (1577646).

Almost surely, 2^8611691 is an apocalyptic number.

8611691 is a deficient number, since it is larger than the sum of its proper divisors (854185).

8611691 is a wasteful number, since it uses less digits than its factorization.

8611691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71193 (or 71182 counting only the distinct ones).

The product of its digits is 2592, while the sum is 32.

The square root of 8611691 is about 2934.5682817069. The cubic root of 8611691 is about 204.9727586249.

It can be divided in two parts, 861 and 1691, that added together give a palindrome (2552).

The spelling of 8611691 in words is "eight million, six hundred eleven thousand, six hundred ninety-one".