1963634 has 4 divisors (see below), whose sum is σ = 2945454. Its totient is φ = 981816.

The previous prime is 1963567. The next prime is 1963639. The reversal of 1963634 is 4363691.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4363691 = 211 ⋅20681.

It can be written as a sum of positive squares in only one way, i.e., 1315609 + 648025 = 1147^2 + 805^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1963634.

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 as a sum of consecutive naturals, namely, 490907 + ... + 490910.

2^1963634 is an apocalyptic number.

1963634 is a deficient number, since it is larger than the sum of its proper divisors (981820).

1963634 is an equidigital number, since it uses as much as digits as its factorization.

1963634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981819.

The product of its digits is 11664, while the sum is 32.

The square root of 1963634 is about 1401.2972561166. The cubic root of 1963634 is about 125.2237911012.

The spelling of 1963634 in words is "one million, nine hundred sixty-three thousand, six hundred thirty-four".