3344857721 has 2 divisors, whose sum is σ = 3344857722. Its totient is φ = 3344857720.

The previous prime is 3344857699. The next prime is 3344857739. The reversal of 3344857721 is 1277584433.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2909092096 + 435765625 = 53936^2 + 20875^2 .

It is a cyclic number.

It is not a de Polignac number, because 3344857721 - 2⁶ = 3344857657 is a prime.

It is a super-2 number, since 2×3344857721² = 22376146347466627682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3344857751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1672428860 + 1672428861.

It is an arithmetic number, because the mean of its divisors is an integer number (1672428861).

Almost surely, 2^3344857721 is an apocalyptic number.

It is an amenable number.

3344857721 is a deficient number, since it is larger than the sum of its proper divisors (1).

3344857721 is an equidigital number, since it uses as much as digits as its factorization.

3344857721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 44.

The square root of 3344857721 is about 57834.7449289785. The cubic root of 3344857721 is about 1495.5211169001.

The spelling of 3344857721 in words is "three billion, three hundred forty-four million, eight hundred fifty-seven thousand, seven hundred twenty-one".