1641963 has 4 divisors (see below), whose sum is σ = 2189288. Its totient is φ = 1094640.

The previous prime is 1641953. The next prime is 1641971. The reversal of 1641963 is 3691461.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1641963 - 2⁵ = 1641931 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1641963.

It is not an unprimeable number, because it can be changed into a prime (1641953) 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, 273658 + ... + 273663.

It is an arithmetic number, because the mean of its divisors is an integer number (547322).

2^1641963 is an apocalyptic number.

1641963 is a deficient number, since it is larger than the sum of its proper divisors (547325).

1641963 is an equidigital number, since it uses as much as digits as its factorization.

1641963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547324.

The product of its digits is 3888, while the sum is 30.

The square root of 1641963 is about 1281.3910410175. The cubic root of 1641963 is about 117.9744031427.

The spelling of 1641963 in words is "one million, six hundred forty-one thousand, nine hundred sixty-three".