1289376971 has 2 divisors, whose sum is σ = 1289376972. Its totient is φ = 1289376970.

The previous prime is 1289376953. The next prime is 1289377003. The reversal of 1289376971 is 1796739821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1289376971 - 2¹⁰ = 1289375947 is a prime.

It is not a weakly prime, because it can be changed into another prime (1289376911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 644688485 + 644688486.

It is an arithmetic number, because the mean of its divisors is an integer number (644688486).

Almost surely, 2^1289376971 is an apocalyptic number.

1289376971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1289376971 is an equidigital number, since it uses as much as digits as its factorization.

1289376971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1143072, while the sum is 53.

The square root of 1289376971 is about 35907.8956637673. The cubic root of 1289376971 is about 1088.4119542201.

The spelling of 1289376971 in words is "one billion, two hundred eighty-nine million, three hundred seventy-six thousand, nine hundred seventy-one".