1008631 has 4 divisors (see below), whose sum is σ = 1086232. Its totient is φ = 931032.

The previous prime is 1008617. The next prime is 1008659. The reversal of 1008631 is 1368001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1368001 = 37 ⋅36973.

It is a cyclic number.

It is not a de Polignac number, because 1008631 - 2⁷ = 1008503 is a prime.

It is a super-2 number, since 2×1008631² = 2034672988322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1008599 and 1008608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1008611) 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, 38781 + ... + 38806.

It is an arithmetic number, because the mean of its divisors is an integer number (271558).

2^1008631 is an apocalyptic number.

1008631 is a deficient number, since it is larger than the sum of its proper divisors (77601).

1008631 is an equidigital number, since it uses as much as digits as its factorization.

1008631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77600.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1008631 is about 1004.3062281993. The cubic root of 1008631 is about 100.2868762333.

The spelling of 1008631 in words is "one million, eight thousand, six hundred thirty-one".