2631687 has 8 divisors (see below), whose sum is σ = 3534720. Its totient is φ = 1741560.

The previous prime is 2631679. The next prime is 2631689. The reversal of 2631687 is 7861362.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2631687 - 2³ = 2631679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2631689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2739 + ... + 3572.

It is an arithmetic number, because the mean of its divisors is an integer number (441840).

2^2631687 is an apocalyptic number.

2631687 is a deficient number, since it is larger than the sum of its proper divisors (903033).

2631687 is a wasteful number, since it uses less digits than its factorization.

2631687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6453.

The product of its digits is 12096, while the sum is 33.

The square root of 2631687 is about 1622.2475150235. The cubic root of 2631687 is about 138.0632455322.

It can be divided in two parts, 263168 and 7, that added together give a triangular number (263175 = T₇₂₅).

The spelling of 2631687 in words is "two million, six hundred thirty-one thousand, six hundred eighty-seven".