3469072781 has 2 divisors, whose sum is σ = 3469072782. Its totient is φ = 3469072780.

The previous prime is 3469072753. The next prime is 3469072799. The reversal of 3469072781 is 1872709643.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2362446025 + 1106626756 = 48605^2 + 33266^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3469072781 is a prime.

It is a super-2 number, since 2×3469072781² = 24068931919750147922, which contains 22 as substring.

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 (3469572781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1734536390 + 1734536391.

It is an arithmetic number, because the mean of its divisors is an integer number (1734536391).

Almost surely, 2^3469072781 is an apocalyptic number.

It is an amenable number.

3469072781 is a deficient number, since it is larger than the sum of its proper divisors (1).

3469072781 is an equidigital number, since it uses as much as digits as its factorization.

3469072781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 47.

The square root of 3469072781 is about 58898.8351412827. The cubic root of 3469072781 is about 1513.8091890394.

The spelling of 3469072781 in words is "three billion, four hundred sixty-nine million, seventy-two thousand, seven hundred eighty-one".