3990215629 has 2 divisors, whose sum is σ = 3990215630. Its totient is φ = 3990215628.

The previous prime is 3990215569. The next prime is 3990215641. The reversal of 3990215629 is 9265120993.

3990215629 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2467108900 + 1523106729 = 49670^2 + 39027^2 .

It is a cyclic number.

It is not a de Polignac number, because 3990215629 - 2¹⁹ = 3989691341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3990215689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1995107814 + 1995107815.

It is an arithmetic number, because the mean of its divisors is an integer number (1995107815).

Almost surely, 2^3990215629 is an apocalyptic number.

It is an amenable number.

3990215629 is a deficient number, since it is larger than the sum of its proper divisors (1).

3990215629 is an equidigital number, since it uses as much as digits as its factorization.

3990215629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 262440, while the sum is 46.

The square root of 3990215629 is about 63168.1535981542. The cubic root of 3990215629 is about 1586.1056851294.

The spelling of 3990215629 in words is "three billion, nine hundred ninety million, two hundred fifteen thousand, six hundred twenty-nine".