3455331721 has 2 divisors, whose sum is σ = 3455331722. Its totient is φ = 3455331720.

The previous prime is 3455331707. The next prime is 3455331731. The reversal of 3455331721 is 1271335543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2985092496 + 470239225 = 54636^2 + 21685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3455331721 is a prime.

It is not a weakly prime, because it can be changed into another prime (3455331731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1727665860 + 1727665861.

It is an arithmetic number, because the mean of its divisors is an integer number (1727665861).

Almost surely, 2^3455331721 is an apocalyptic number.

It is an amenable number.

3455331721 is a deficient number, since it is larger than the sum of its proper divisors (1).

3455331721 is an equidigital number, since it uses as much as digits as its factorization.

3455331721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 34.

The square root of 3455331721 is about 58782.0697236836. The cubic root of 3455331721 is about 1511.8078023443.

The spelling of 3455331721 in words is "three billion, four hundred fifty-five million, three hundred thirty-one thousand, seven hundred twenty-one".