1963263121 has 4 divisors (see below), whose sum is σ = 1982324032. Its totient is φ = 1944202212.

The previous prime is 1963263119. The next prime is 1963263131. The reversal of 1963263121 is 1213623691.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1963263121 - 2¹ = 1963263119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1963263131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9530301 + ... + 9530506.

It is an arithmetic number, because the mean of its divisors is an integer number (495581008).

Almost surely, 2^1963263121 is an apocalyptic number.

It is an amenable number.

1963263121 is a deficient number, since it is larger than the sum of its proper divisors (19060911).

1963263121 is a wasteful number, since it uses less digits than its factorization.

1963263121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19060910.

The product of its digits is 11664, while the sum is 34.

The square root of 1963263121 is about 44308.7251114270. The cubic root of 1963263121 is about 1252.1590677407.

The spelling of 1963263121 in words is "one billion, nine hundred sixty-three million, two hundred sixty-three thousand, one hundred twenty-one".