8611631 has 4 divisors (see below), whose sum is σ = 9841872. Its totient is φ = 7381392.

The previous prime is 8611619. The next prime is 8611633. The reversal of 8611631 is 1361168.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8611631 - 2¹⁰ = 8610607 is a prime.

It is a super-2 number, since 2×8611631² = 148320376960322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8611631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8611633) 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, 615110 + ... + 615123.

It is an arithmetic number, because the mean of its divisors is an integer number (2460468).

Almost surely, 2^8611631 is an apocalyptic number.

8611631 is a deficient number, since it is larger than the sum of its proper divisors (1230241).

8611631 is a wasteful number, since it uses less digits than its factorization.

8611631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1230240.

The product of its digits is 864, while the sum is 26.

The square root of 8611631 is about 2934.5580587203. The cubic root of 8611631 is about 204.9722825901.

Adding to 8611631 its reverse (1361168), we get a palindrome (9972799).

The spelling of 8611631 in words is "eight million, six hundred eleven thousand, six hundred thirty-one".