3987229 has 2 divisors, whose sum is σ = 3987230. Its totient is φ = 3987228.

The previous prime is 3987227. The next prime is 3987259. The reversal of 3987229 is 9227893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2474329 + 1512900 = 1573^2 + 1230^2 .

It is a cyclic number.

It is not a de Polignac number, because 3987229 - 2¹ = 3987227 is a prime.

Together with 3987227, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 3987191 and 3987200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3987227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1993614 + 1993615.

It is an arithmetic number, because the mean of its divisors is an integer number (1993615).

Almost surely, 2^3987229 is an apocalyptic number.

It is an amenable number.

3987229 is a deficient number, since it is larger than the sum of its proper divisors (1).

3987229 is an equidigital number, since it uses as much as digits as its factorization.

3987229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 40.

The square root of 3987229 is about 1996.8046975105. The cubic root of 3987229 is about 158.5709859268.

The spelling of 3987229 in words is "three million, nine hundred eighty-seven thousand, two hundred twenty-nine".