1671963 has 4 divisors (see below), whose sum is σ = 2229288. Its totient is φ = 1114640.

The previous prime is 1671961. The next prime is 1671977. The reversal of 1671963 is 3691761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3691761 = 3 ⋅1230587.

It is a cyclic number.

It is not a de Polignac number, because 1671963 - 2¹ = 1671961 is a prime.

It is a D-number.

1671963 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1671961) 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, 278658 + ... + 278663.

It is an arithmetic number, because the mean of its divisors is an integer number (557322).

2^1671963 is an apocalyptic number.

1671963 is a deficient number, since it is larger than the sum of its proper divisors (557325).

1671963 is an equidigital number, since it uses as much as digits as its factorization.

1671963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557324.

The product of its digits is 6804, while the sum is 33.

The square root of 1671963 is about 1293.0440827752. The cubic root of 1671963 is about 118.6885673013.

The spelling of 1671963 in words is "one million, six hundred seventy-one thousand, nine hundred sixty-three".