3402771721 has 4 divisors (see below), whose sum is σ = 3415421700. Its totient is φ = 3390121744.

The previous prime is 3402771689. The next prime is 3402771727. The reversal of 3402771721 is 1271772043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1271772043 = 20939 ⋅60737.

It can be written as a sum of positive squares in 2 ways, for example, as 743925625 + 2658846096 = 27275^2 + 51564^2 .

It is a cyclic number.

It is not a de Polignac number, because 3402771721 - 2⁵ = 3402771689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3402771727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6324586 + ... + 6325123.

It is an arithmetic number, because the mean of its divisors is an integer number (853855425).

Almost surely, 2^3402771721 is an apocalyptic number.

It is an amenable number.

3402771721 is a deficient number, since it is larger than the sum of its proper divisors (12649979).

3402771721 is a wasteful number, since it uses less digits than its factorization.

3402771721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12649978.

The product of its (nonzero) digits is 16464, while the sum is 34.

The square root of 3402771721 is about 58333.2814180721. The cubic root of 3402771721 is about 1504.1030952098.

The spelling of 3402771721 in words is "three billion, four hundred two million, seven hundred seventy-one thousand, seven hundred twenty-one".