4318991309 has 2 divisors, whose sum is σ = 4318991310. Its totient is φ = 4318991308.

The previous prime is 4318991279. The next prime is 4318991317. The reversal of 4318991309 is 9031998134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4234755625 + 84235684 = 65075^2 + 9178^2 .

It is a cyclic number.

It is not a de Polignac number, because 4318991309 - 2²⁸ = 4050555853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4318991009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2159495654 + 2159495655.

It is an arithmetic number, because the mean of its divisors is an integer number (2159495655).

Almost surely, 2^4318991309 is an apocalyptic number.

It is an amenable number.

4318991309 is a deficient number, since it is larger than the sum of its proper divisors (1).

4318991309 is an equidigital number, since it uses as much as digits as its factorization.

4318991309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 47.

The square root of 4318991309 is about 65719.0330802272. The cubic root of 4318991309 is about 1628.5238004315.

The spelling of 4318991309 in words is "four billion, three hundred eighteen million, nine hundred ninety-one thousand, three hundred nine".