2086631 has 4 divisors (see below), whose sum is σ = 2209392. Its totient is φ = 1963872.

The previous prime is 2086621. The next prime is 2086639. The reversal of 2086631 is 1366802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1366802 = 2 ⋅683401.

It is a cyclic number.

It is not a de Polignac number, because 2086631 - 2¹⁰ = 2085607 is a prime.

It is a super-2 number, since 2×2086631² = 8708057860322, 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 2086631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2086639) 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, 61355 + ... + 61388.

It is an arithmetic number, because the mean of its divisors is an integer number (552348).

2^2086631 is an apocalyptic number.

2086631 is a deficient number, since it is larger than the sum of its proper divisors (122761).

2086631 is a wasteful number, since it uses less digits than its factorization.

2086631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122760.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 2086631 is about 1444.5175665252. The cubic root of 2086631 is about 127.7855907566.

The spelling of 2086631 in words is "two million, eighty-six thousand, six hundred thirty-one".