306209357849 has 2 divisors, whose sum is σ = 306209357850. Its totient is φ = 306209357848.

The previous prime is 306209357837. The next prime is 306209357863. The reversal of 306209357849 is 948753902603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 301887610249 + 4321747600 = 549443^2 + 65740^2 .

It is a cyclic number.

It is not a de Polignac number, because 306209357849 - 2⁴ = 306209357833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 306209357794 and 306209357803.

It is not a weakly prime, because it can be changed into another prime (306209357819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153104678924 + 153104678925.

It is an arithmetic number, because the mean of its divisors is an integer number (153104678925).

Almost surely, 2^306209357849 is an apocalyptic number.

It is an amenable number.

306209357849 is a deficient number, since it is larger than the sum of its proper divisors (1).

306209357849 is an equidigital number, since it uses as much as digits as its factorization.

306209357849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9797760, while the sum is 56.

The spelling of 306209357849 in words is "three hundred six billion, two hundred nine million, three hundred fifty-seven thousand, eight hundred forty-nine".