3146781361 has 2 divisors, whose sum is σ = 3146781362. Its totient is φ = 3146781360.

The previous prime is 3146781353. The next prime is 3146781367. The reversal of 3146781361 is 1631876413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2771390736 + 375390625 = 52644^2 + 19375^2 .

It is a cyclic number.

It is not a de Polignac number, because 3146781361 - 2³ = 3146781353 is a prime.

It is not a weakly prime, because it can be changed into another prime (3146781367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1573390680 + 1573390681.

It is an arithmetic number, because the mean of its divisors is an integer number (1573390681).

Almost surely, 2^3146781361 is an apocalyptic number.

It is an amenable number.

3146781361 is a deficient number, since it is larger than the sum of its proper divisors (1).

3146781361 is an equidigital number, since it uses as much as digits as its factorization.

3146781361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 40.

The square root of 3146781361 is about 56096.1795579699. The cubic root of 3146781361 is about 1465.3977589480.

The spelling of 3146781361 in words is "three billion, one hundred forty-six million, seven hundred eighty-one thousand, three hundred sixty-one".