1289376963 has 12 divisors (see below), whose sum is σ = 2128495408. Its totient is φ = 736786800.

The previous prime is 1289376953. The next prime is 1289376971. The reversal of 1289376963 is 3696739821.

It is not a de Polignac number, because 1289376963 - 2⁶ = 1289376899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1289376953) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10233088 + ... + 10233213.

Almost surely, 2^1289376963 is an apocalyptic number.

1289376963 is a deficient number, since it is larger than the sum of its proper divisors (839118445).

1289376963 is a wasteful number, since it uses less digits than its factorization.

1289376963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20466314 (or 20466311 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The square root of 1289376963 is about 35907.8955523712. The cubic root of 1289376963 is about 1088.4119519690.

The spelling of 1289376963 in words is "one billion, two hundred eighty-nine million, three hundred seventy-six thousand, nine hundred sixty-three".