3656230421 has 2 divisors, whose sum is σ = 3656230422. Its totient is φ = 3656230420.

The previous prime is 3656230411. The next prime is 3656230441. The reversal of 3656230421 is 1240326563.

3656230421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3591604900 + 64625521 = 59930^2 + 8039^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3656230421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3656230411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1828115210 + 1828115211.

It is an arithmetic number, because the mean of its divisors is an integer number (1828115211).

Almost surely, 2^3656230421 is an apocalyptic number.

It is an amenable number.

3656230421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3656230421 is an equidigital number, since it uses as much as digits as its factorization.

3656230421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 3656230421 is about 60466.7712136178. The cubic root of 3656230421 is about 1540.5572870634.

Adding to 3656230421 its reverse (1240326563), we get a palindrome (4896556984).

The spelling of 3656230421 in words is "three billion, six hundred fifty-six million, two hundred thirty thousand, four hundred twenty-one".