306803749 has 6 divisors (see below), whose sum is σ = 356894214. Its totient is φ = 262974600.

The previous prime is 306803729. The next prime is 306803797. The reversal of 306803749 is 947308603.

It can be written as a sum of positive squares in only one way, i.e., 299913124 + 6890625 = 17318^2 + 2625^2 .

It is not a de Polignac number, because 306803749 - 2¹³ = 306795557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306803729) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3130602 + ... + 3130699.

It is an arithmetic number, because the mean of its divisors is an integer number (59482369).

Almost surely, 2^306803749 is an apocalyptic number.

It is an amenable number.

306803749 is a deficient number, since it is larger than the sum of its proper divisors (50090465).

306803749 is an equidigital number, since it uses as much as digits as its factorization.

306803749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6261315 (or 6261308 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 306803749 is about 17515.8142545529. The cubic root of 306803749 is about 674.4558936672.

The spelling of 306803749 in words is "three hundred six million, eight hundred three thousand, seven hundred forty-nine".