4081749989 has 2 divisors, whose sum is σ = 4081749990. Its totient is φ = 4081749988.

The previous prime is 4081749961. The next prime is 4081750019. The reversal of 4081749989 is 9899471804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2415722500 + 1666027489 = 49150^2 + 40817^2 .

It is a cyclic number.

It is not a de Polignac number, because 4081749989 - 2²⁰ = 4080701413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4081749949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2040874994 + 2040874995.

It is an arithmetic number, because the mean of its divisors is an integer number (2040874995).

Almost surely, 2^4081749989 is an apocalyptic number.

It is an amenable number.

4081749989 is a deficient number, since it is larger than the sum of its proper divisors (1).

4081749989 is an equidigital number, since it uses as much as digits as its factorization.

4081749989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5225472, while the sum is 59.

The square root of 4081749989 is about 63888.5747923680. The cubic root of 4081749989 is about 1598.1423739182.

The spelling of 4081749989 in words is "four billion, eighty-one million, seven hundred forty-nine thousand, nine hundred eighty-nine".