1289982963 has 4 divisors (see below), whose sum is σ = 1719977288. Its totient is φ = 859988640.

The previous prime is 1289982923. The next prime is 1289982997. The reversal of 1289982963 is 3692899821.

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

It is not a de Polignac number, because 1289982963 - 2¹² = 1289978867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1289982923) 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, 214997158 + ... + 214997163.

It is an arithmetic number, because the mean of its divisors is an integer number (429994322).

Almost surely, 2^1289982963 is an apocalyptic number.

1289982963 is a deficient number, since it is larger than the sum of its proper divisors (429994325).

1289982963 is an equidigital number, since it uses as much as digits as its factorization.

1289982963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429994324.

The product of its digits is 3359232, while the sum is 57.

The square root of 1289982963 is about 35916.3328167005. The cubic root of 1289982963 is about 1088.5824411164.

The spelling of 1289982963 in words is "one billion, two hundred eighty-nine million, nine hundred eighty-two thousand, nine hundred sixty-three".