3456322781 has 2 divisors, whose sum is σ = 3456322782. Its totient is φ = 3456322780.

The previous prime is 3456322763. The next prime is 3456322799. The reversal of 3456322781 is 1872236543.

3456322781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (3456322763) and next prime (3456322799).

It can be written as a sum of positive squares in only one way, i.e., 1906719556 + 1549603225 = 43666^2 + 39365^2 .

It is a cyclic number.

It is not a de Polignac number, because 3456322781 - 2²⁶ = 3389213917 is a prime.

It is a super-3 number, since 3×3456322781³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3456322741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1728161390 + 1728161391.

It is an arithmetic number, because the mean of its divisors is an integer number (1728161391).

Almost surely, 2^3456322781 is an apocalyptic number.

It is an amenable number.

3456322781 is a deficient number, since it is larger than the sum of its proper divisors (1).

3456322781 is an equidigital number, since it uses as much as digits as its factorization.

3456322781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 41.

The square root of 3456322781 is about 58790.4990708533. The cubic root of 3456322781 is about 1511.9523276882.

The spelling of 3456322781 in words is "three billion, four hundred fifty-six million, three hundred twenty-two thousand, seven hundred eighty-one".