2000239621 has 2 divisors, whose sum is σ = 2000239622. Its totient is φ = 2000239620.

The previous prime is 2000239589. The next prime is 2000239673. The reversal of 2000239621 is 1269320002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1997106721 + 3132900 = 44689^2 + 1770^2 .

It is a cyclic number.

It is not a de Polignac number, because 2000239621 - 2⁵ = 2000239589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2000237621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000119810 + 1000119811.

It is an arithmetic number, because the mean of its divisors is an integer number (1000119811).

Almost surely, 2^2000239621 is an apocalyptic number.

It is an amenable number.

2000239621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2000239621 is an equidigital number, since it uses as much as digits as its factorization.

2000239621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 2000239621 is about 44724.0385139804. The cubic root of 2000239621 is about 1259.9713651425.

Adding to 2000239621 its reverse (1269320002), we get a palindrome (3269559623).

The spelling of 2000239621 in words is "two billion, two hundred thirty-nine thousand, six hundred twenty-one".