2538309989 has 2 divisors, whose sum is σ = 2538309990. Its totient is φ = 2538309988.

The previous prime is 2538309931. The next prime is 2538310009. The reversal of 2538309989 is 9899038352.

2538309989 is digitally balanced in base 2, 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., 1534053889 + 1004256100 = 39167^2 + 31690^2 .

It is a cyclic number.

It is not a de Polignac number, because 2538309989 - 2¹⁶ = 2538244453 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2538309929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1269154994 + 1269154995.

It is an arithmetic number, because the mean of its divisors is an integer number (1269154995).

Almost surely, 2^2538309989 is an apocalyptic number.

It is an amenable number.

2538309989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2538309989 is an equidigital number, since it uses as much as digits as its factorization.

2538309989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4199040, while the sum is 56.

The square root of 2538309989 is about 50381.6433733557. The cubic root of 2538309989 is about 1364.1063155107.

The spelling of 2538309989 in words is "two billion, five hundred thirty-eight million, three hundred nine thousand, nine hundred eighty-nine".