3402013721 has 2 divisors, whose sum is σ = 3402013722. Its totient is φ = 3402013720.

The previous prime is 3402013649. The next prime is 3402013733. The reversal of 3402013721 is 1273102043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1957177600 + 1444836121 = 44240^2 + 38011^2 .

It is an emirp because it is prime and its reverse (1273102043) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3402013721 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3402013781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1701006860 + 1701006861.

It is an arithmetic number, because the mean of its divisors is an integer number (1701006861).

Almost surely, 2^3402013721 is an apocalyptic number.

It is an amenable number.

3402013721 is a deficient number, since it is larger than the sum of its proper divisors (1).

3402013721 is an equidigital number, since it uses as much as digits as its factorization.

3402013721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 3402013721 is about 58326.7839075669. The cubic root of 3402013721 is about 1503.9914024579.

Adding to 3402013721 its reverse (1273102043), we get a palindrome (4675115764).

The spelling of 3402013721 in words is "three billion, four hundred two million, thirteen thousand, seven hundred twenty-one".