3304309781 has 2 divisors, whose sum is σ = 3304309782. Its totient is φ = 3304309780.

The previous prime is 3304309777. The next prime is 3304309787. The reversal of 3304309781 is 1879034033.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3109846756 + 194463025 = 55766^2 + 13945^2 .

It is a cyclic number.

It is not a de Polignac number, because 3304309781 - 2² = 3304309777 is a prime.

It is a super-2 number, since 2×3304309781² = 21836926257624535922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3304309787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1652154890 + 1652154891.

It is an arithmetic number, because the mean of its divisors is an integer number (1652154891).

Almost surely, 2^3304309781 is an apocalyptic number.

It is an amenable number.

3304309781 is a deficient number, since it is larger than the sum of its proper divisors (1).

3304309781 is an equidigital number, since it uses as much as digits as its factorization.

3304309781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 3304309781 is about 57483.1260545214. The cubic root of 3304309781 is about 1489.4533948364.

The spelling of 3304309781 in words is "three billion, three hundred four million, three hundred nine thousand, seven hundred eighty-one".