3820429 has 2 divisors, whose sum is σ = 3820430. Its totient is φ = 3820428.

The previous prime is 3820423. The next prime is 3820441. The reversal of 3820429 is 9240283.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3697929 + 122500 = 1923^2 + 350^2 .

It is a cyclic number.

It is not a de Polignac number, because 3820429 - 2²¹ = 1723277 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 3820397 and 3820406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3820423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1910214 + 1910215.

It is an arithmetic number, because the mean of its divisors is an integer number (1910215).

Almost surely, 2^3820429 is an apocalyptic number.

It is an amenable number.

3820429 is a deficient number, since it is larger than the sum of its proper divisors (1).

3820429 is an equidigital number, since it uses as much as digits as its factorization.

3820429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 3820429 is about 1954.5917732355. The cubic root of 3820429 is about 156.3282181178.

The spelling of 3820429 in words is "three million, eight hundred twenty thousand, four hundred twenty-nine".