1963903 has 4 divisors (see below), whose sum is σ = 1966960. Its totient is φ = 1960848.

The previous prime is 1963889. The next prime is 1963921. The reversal of 1963903 is 3093691.

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

It is a cyclic number.

It is not a de Polignac number, because 1963903 - 2⁹ = 1963391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1963103) 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, 150 + ... + 1987.

It is an arithmetic number, because the mean of its divisors is an integer number (491740).

2^1963903 is an apocalyptic number.

1963903 is a deficient number, since it is larger than the sum of its proper divisors (3057).

1963903 is an equidigital number, since it uses as much as digits as its factorization.

1963903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3056.

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 1963903 is about 1401.3932353198. The cubic root of 1963903 is about 125.2295090137.

The spelling of 1963903 in words is "one million, nine hundred sixty-three thousand, nine hundred three".