3128389207 has 2 divisors, whose sum is σ = 3128389208. Its totient is φ = 3128389206.

The previous prime is 3128389193. The next prime is 3128389241. The reversal of 3128389207 is 7029838213.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3128389207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3128389807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1564194603 + 1564194604.

It is an arithmetic number, because the mean of its divisors is an integer number (1564194604).

Almost surely, 2^3128389207 is an apocalyptic number.

3128389207 is a deficient number, since it is larger than the sum of its proper divisors (1).

3128389207 is an equidigital number, since it uses as much as digits as its factorization.

3128389207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 3128389207 is about 55932.0052116854. The cubic root of 3128389207 is about 1462.5372168872.

The spelling of 3128389207 in words is "three billion, one hundred twenty-eight million, three hundred eighty-nine thousand, two hundred seven".