3905004989 has 2 divisors, whose sum is σ = 3905004990. Its totient is φ = 3905004988.

The previous prime is 3905004973. The next prime is 3905004991. The reversal of 3905004989 is 9894005093.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3833467225 + 71537764 = 61915^2 + 8458^2 .

It is a cyclic number.

It is not a de Polignac number, because 3905004989 - 2⁴ = 3905004973 is a prime.

It is a super-2 number, since 2×3905004989² = 30498127928229780242, which contains 22 as substring.

Together with 3905004991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3905000989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1952502494 + 1952502495.

It is an arithmetic number, because the mean of its divisors is an integer number (1952502495).

Almost surely, 2^3905004989 is an apocalyptic number.

It is an amenable number.

3905004989 is a deficient number, since it is larger than the sum of its proper divisors (1).

3905004989 is an equidigital number, since it uses as much as digits as its factorization.

3905004989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 3905004989 is about 62490.0391182467. The cubic root of 3905004989 is about 1574.7339755956.

The spelling of 3905004989 in words is "three billion, nine hundred five million, four thousand, nine hundred eighty-nine".