39873682489 has 2 divisors, whose sum is σ = 39873682490. Its totient is φ = 39873682488.

The previous prime is 39873682483. The next prime is 39873682523. The reversal of 39873682489 is 98428637893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23437160464 + 16436522025 = 153092^2 + 128205^2 .

It is a cyclic number.

It is not a de Polignac number, because 39873682489 - 2⁷ = 39873682361 is a prime.

It is not a weakly prime, because it can be changed into another prime (39873682483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19936841244 + 19936841245.

It is an arithmetic number, because the mean of its divisors is an integer number (19936841245).

Almost surely, 2^39873682489 is an apocalyptic number.

It is an amenable number.

39873682489 is a deficient number, since it is larger than the sum of its proper divisors (1).

39873682489 is an equidigital number, since it uses as much as digits as its factorization.

39873682489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 125411328, while the sum is 67.

The spelling of 39873682489 in words is "thirty-nine billion, eight hundred seventy-three million, six hundred eighty-two thousand, four hundred eighty-nine".