3146639789 has 2 divisors, whose sum is σ = 3146639790. Its totient is φ = 3146639788.

The previous prime is 3146639773. The next prime is 3146639813. The reversal of 3146639789 is 9879366413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2519538025 + 627101764 = 50195^2 + 25042^2 .

It is a cyclic number.

It is not a de Polignac number, because 3146639789 - 2⁴ = 3146639773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3146639719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1573319894 + 1573319895.

It is an arithmetic number, because the mean of its divisors is an integer number (1573319895).

Almost surely, 2^3146639789 is an apocalyptic number.

It is an amenable number.

3146639789 is a deficient number, since it is larger than the sum of its proper divisors (1).

3146639789 is an equidigital number, since it uses as much as digits as its factorization.

3146639789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5878656, while the sum is 56.

The square root of 3146639789 is about 56094.9176753117. The cubic root of 3146639789 is about 1465.3757827996.

The spelling of 3146639789 in words is "three billion, one hundred forty-six million, six hundred thirty-nine thousand, seven hundred eighty-nine".