1963039421 has 8 divisors (see below), whose sum is σ = 2289259200. Its totient is φ = 1682604924.

The previous prime is 1963039367. The next prime is 1963039427. The reversal of 1963039421 is 1249303691.

It is not a de Polignac number, because 1963039421 - 2¹⁰ = 1963038397 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 (1963039427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2861231 + ... + 2861916.

It is an arithmetic number, because the mean of its divisors is an integer number (286157400).

Almost surely, 2^1963039421 is an apocalyptic number.

It is an amenable number.

1963039421 is a deficient number, since it is larger than the sum of its proper divisors (326219779).

1963039421 is an frugal number, since it uses more digits than its factorization.

1963039421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5723168 (or 5723154 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 1963039421 is about 44306.2007059960. The cubic root of 1963039421 is about 1252.1115076998. Note that the first 3 decimals are identical.

The spelling of 1963039421 in words is "one billion, nine hundred sixty-three million, thirty-nine thousand, four hundred twenty-one".