2389975949 has 2 divisors, whose sum is σ = 2389975950. Its totient is φ = 2389975948.

The previous prime is 2389975937. The next prime is 2389975997. The reversal of 2389975949 is 9495799832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1584438025 + 805537924 = 39805^2 + 28382^2 .

It is a cyclic number.

It is not a de Polignac number, because 2389975949 - 2¹² = 2389971853 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 (2389975909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1194987974 + 1194987975.

It is an arithmetic number, because the mean of its divisors is an integer number (1194987975).

Almost surely, 2^2389975949 is an apocalyptic number.

It is an amenable number.

2389975949 is a deficient number, since it is larger than the sum of its proper divisors (1).

2389975949 is an equidigital number, since it uses as much as digits as its factorization.

2389975949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44089920, while the sum is 65.

The square root of 2389975949 is about 48887.3802632131. The cubic root of 2389975949 is about 1336.9992906564. Note that the first 3 decimals are identical.

The spelling of 2389975949 in words is "two billion, three hundred eighty-nine million, nine hundred seventy-five thousand, nine hundred forty-nine".