1968643103 has 4 divisors (see below), whose sum is σ = 2249877840. Its totient is φ = 1687408368.

The previous prime is 1968643097. The next prime is 1968643109. The reversal of 1968643103 is 3013468691.

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

It is an interprime number because it is at equal distance from previous prime (1968643097) and next prime (1968643109).

It is a cyclic number.

It is not a de Polignac number, because 1968643103 - 2⁴ = 1968643087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1968643109) 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, 140617358 + ... + 140617371.

It is an arithmetic number, because the mean of its divisors is an integer number (562469460).

Almost surely, 2^1968643103 is an apocalyptic number.

1968643103 is a deficient number, since it is larger than the sum of its proper divisors (281234737).

1968643103 is an equidigital number, since it uses as much as digits as its factorization.

1968643103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281234736.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 1968643103 is about 44369.3937641704. The cubic root of 1968643103 is about 1253.3017994572.

The spelling of 1968643103 in words is "one billion, nine hundred sixty-eight million, six hundred forty-three thousand, one hundred three".