3447986809 has 2 divisors, whose sum is σ = 3447986810. Its totient is φ = 3447986808.

The previous prime is 3447986779. The next prime is 3447986887. The reversal of 3447986809 is 9086897443.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2108646400 + 1339340409 = 45920^2 + 36597^2 .

It is a cyclic number.

It is not a de Polignac number, because 3447986809 - 2⁷ = 3447986681 is a prime.

It is a super-2 number, since 2×3447986809² = 23777226070076004962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3447986909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1723993404 + 1723993405.

It is an arithmetic number, because the mean of its divisors is an integer number (1723993405).

Almost surely, 2^3447986809 is an apocalyptic number.

It is an amenable number.

3447986809 is a deficient number, since it is larger than the sum of its proper divisors (1).

3447986809 is an equidigital number, since it uses as much as digits as its factorization.

3447986809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10450944, while the sum is 58.

The square root of 3447986809 is about 58719.5607016946. The cubic root of 3447986809 is about 1510.7358384568.

The spelling of 3447986809 in words is "three billion, four hundred forty-seven million, nine hundred eighty-six thousand, eight hundred nine".