1163631 has 8 divisors (see below), whose sum is σ = 1773184. Its totient is φ = 664920.

The previous prime is 1163629. The next prime is 1163641. The reversal of 1163631 is 1363611.

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

It is not a de Polignac number, because 1163631 - 2¹ = 1163629 is a prime.

It is a super-2 number, since 2×1163631² = 2708074208322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 55411 = 1163631 / (1 + 1 + 6 + 3 + 6 + 3 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 1163598 and 1163607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1163611) 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 7 ways as a sum of consecutive naturals, for example, 27685 + ... + 27726.

It is an arithmetic number, because the mean of its divisors is an integer number (221648).

2^1163631 is an apocalyptic number.

1163631 is a deficient number, since it is larger than the sum of its proper divisors (609553).

1163631 is an equidigital number, since it uses as much as digits as its factorization.

1163631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55421.

The product of its digits is 324, while the sum is 21.

The square root of 1163631 is about 1078.7172938263. The cubic root of 1163631 is about 105.1812741660.

The spelling of 1163631 in words is "one million, one hundred sixty-three thousand, six hundred thirty-one".