3683154721 has 3 divisors (see below), whose sum is σ = 3683215411. Its totient is φ = 3683094032.

The previous prime is 3683154719. The next prime is 3683154781. The reversal of 3683154721 is 1274513863.

The square root of 3683154721 is 60689.

It is a perfect power (a square), and thus also a powerful number.

3683154721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 2293356321 + 1389798400 = 47889^2 + 37280^2 .

It is not a de Polignac number, because 3683154721 - 2¹ = 3683154719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3683154781) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 30345 + ... + 91033.

Almost surely, 2^3683154721 is an apocalyptic number.

3683154721 is the 60689-th square number.

3683154721 is the 30345-th centered octagonal number.

It is an amenable number.

3683154721 is a deficient number, since it is larger than the sum of its proper divisors (60690).

3683154721 is an frugal number, since it uses more digits than its factorization.

3683154721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121378 (or 60689 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The cubic root of 3683154721 is about 1544.3295717457.

It can be divided in two parts, 3683 and 154721, that added together give a square (158404 = 398²).

The spelling of 3683154721 in words is "three billion, six hundred eighty-three million, one hundred fifty-four thousand, seven hundred twenty-one".