1963631 has 4 divisors (see below), whose sum is σ = 2067000. Its totient is φ = 1860264.

The previous prime is 1963567. The next prime is 1963639. The reversal of 1963631 is 1363691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1363691 = 7 ⋅194813.

It is a cyclic number.

It is not a de Polignac number, because 1963631 - 2⁶ = 1963567 is a prime.

It is a super-2 number, since 2×1963631² = 7711693408322, 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 = 1963594 and 1963603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1963639) 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, 51656 + ... + 51693.

It is an arithmetic number, because the mean of its divisors is an integer number (516750).

2^1963631 is an apocalyptic number.

1963631 is a deficient number, since it is larger than the sum of its proper divisors (103369).

1963631 is a wasteful number, since it uses less digits than its factorization.

1963631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103368.

The product of its digits is 2916, while the sum is 29.

The square root of 1963631 is about 1401.2961856795. The cubic root of 1963631 is about 125.2237273298.

The spelling of 1963631 in words is "one million, nine hundred sixty-three thousand, six hundred thirty-one".