4149781409 has 2 divisors, whose sum is σ = 4149781410. Its totient is φ = 4149781408.

The previous prime is 4149781403. The next prime is 4149781429. The reversal of 4149781409 is 9041879414.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4143754384 + 6027025 = 64372^2 + 2455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4149781409 is a prime.

It is not a weakly prime, because it can be changed into another prime (4149781403) 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, 2074890704 + 2074890705.

It is an arithmetic number, because the mean of its divisors is an integer number (2074890705).

Almost surely, 2^4149781409 is an apocalyptic number.

It is an amenable number.

4149781409 is a deficient number, since it is larger than the sum of its proper divisors (1).

4149781409 is an equidigital number, since it uses as much as digits as its factorization.

4149781409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 4149781409 is about 64418.7970160884. The cubic root of 4149781409 is about 1606.9723598694.

The spelling of 4149781409 in words is "four billion, one hundred forty-nine million, seven hundred eighty-one thousand, four hundred nine".