2101323989 has 2 divisors, whose sum is σ = 2101323990. Its totient is φ = 2101323988.

The previous prime is 2101323979. The next prime is 2101324013. The reversal of 2101323989 is 9893231012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2100388900 + 935089 = 45830^2 + 967^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101323989 - 2¹² = 2101319893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2101323949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050661994 + 1050661995.

It is an arithmetic number, because the mean of its divisors is an integer number (1050661995).

Almost surely, 2^2101323989 is an apocalyptic number.

It is an amenable number.

2101323989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101323989 is an equidigital number, since it uses as much as digits as its factorization.

2101323989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 2101323989 is about 45840.2005776589. The cubic root of 2101323989 is about 1280.8482311045.

The spelling of 2101323989 in words is "two billion, one hundred one million, three hundred twenty-three thousand, nine hundred eighty-nine".