1289740137 has 32 divisors (see below), whose sum is σ = 1983225600. Its totient is φ = 730315008.

The previous prime is 1289740097. The next prime is 1289740181. The reversal of 1289740137 is 7310479821.

It is not a de Polignac number, because 1289740137 - 2⁶ = 1289740073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1289740187) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1293123 + ... + 1294119.

It is an arithmetic number, because the mean of its divisors is an integer number (61975800).

Almost surely, 2^1289740137 is an apocalyptic number.

It is an amenable number.

1289740137 is a deficient number, since it is larger than the sum of its proper divisors (693485463).

1289740137 is a wasteful number, since it uses less digits than its factorization.

1289740137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1505.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 1289740137 is about 35912.9522178280. The cubic root of 1289740137 is about 1088.5141320210.

The spelling of 1289740137 in words is "one billion, two hundred eighty-nine million, seven hundred forty thousand, one hundred thirty-seven".