1063631 has 4 divisors (see below), whose sum is σ = 1074264. Its totient is φ = 1053000.

The previous prime is 1063627. The next prime is 1063637. The reversal of 1063631 is 1363601.

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 1063631 - 2² = 1063627 is a prime.

It is a super-2 number, since 2×1063631² = 2262621808322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1063637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5165 + ... + 5366.

It is an arithmetic number, because the mean of its divisors is an integer number (268566).

2^1063631 is an apocalyptic number.

1063631 is a deficient number, since it is larger than the sum of its proper divisors (10633).

1063631 is a wasteful number, since it uses less digits than its factorization.

1063631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10632.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 1063631 is about 1031.3248760696. The cubic root of 1063631 is about 102.0775713903.

Subtracting from 1063631 its sum of digits (20), we obtain a triangular number (1063611 = T₁₄₅₈).

The spelling of 1063631 in words is "one million, sixty-three thousand, six hundred thirty-one".