1630631 has 8 divisors (see below), whose sum is σ = 1757184. Its totient is φ = 1508760.

The previous prime is 1630621. The next prime is 1630633. The reversal of 1630631 is 1360361.

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

It is a cyclic number.

It is not a de Polignac number, because 1630631 - 2¹⁴ = 1614247 is a prime.

It is a super-2 number, since 2×1630631² = 5317914916322, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1630633) 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, 431 + ... + 1856.

It is an arithmetic number, because the mean of its divisors is an integer number (219648).

2^1630631 is an apocalyptic number.

1630631 is a deficient number, since it is larger than the sum of its proper divisors (126553).

1630631 is a wasteful number, since it uses less digits than its factorization.

1630631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2341.

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

The square root of 1630631 is about 1276.9616282410. The cubic root of 1630631 is about 117.7023764513.

Adding to 1630631 its reverse (1360361), we get a palindrome (2990992).

The spelling of 1630631 in words is "one million, six hundred thirty thousand, six hundred thirty-one".