139012889 has 2 divisors, whose sum is σ = 139012890. Its totient is φ = 139012888.

The previous prime is 139012883. The next prime is 139012901. The reversal of 139012889 is 988210931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102010000 + 37002889 = 10100^2 + 6083^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139012889 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (139012883) 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 as a sum of consecutive naturals, namely, 69506444 + 69506445.

It is an arithmetic number, because the mean of its divisors is an integer number (69506445).

Almost surely, 2^139012889 is an apocalyptic number.

It is an amenable number.

139012889 is a deficient number, since it is larger than the sum of its proper divisors (1).

139012889 is an equidigital number, since it uses as much as digits as its factorization.

139012889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 139012889 is about 11790.3727252365. The cubic root of 139012889 is about 518.0261573530.

The spelling of 139012889 in words is "one hundred thirty-nine million, twelve thousand, eight hundred eighty-nine".