307216849 has 2 divisors, whose sum is σ = 307216850. Its totient is φ = 307216848.

The previous prime is 307216841. The next prime is 307216891. The reversal of 307216849 is 948612703.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 238857025 + 68359824 = 15455^2 + 8268^2 .

It is a cyclic number.

It is not a de Polignac number, because 307216849 - 2³ = 307216841 is a prime.

It is not a weakly prime, because it can be changed into another prime (307216841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153608424 + 153608425.

It is an arithmetic number, because the mean of its divisors is an integer number (153608425).

Almost surely, 2^307216849 is an apocalyptic number.

It is an amenable number.

307216849 is a deficient number, since it is larger than the sum of its proper divisors (1).

307216849 is an equidigital number, since it uses as much as digits as its factorization.

307216849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 307216849 is about 17527.6024886463. The cubic root of 307216849 is about 674.7584679508.

It can be divided in two parts, 307 and 216849, that added together give a square (217156 = 466²).

The spelling of 307216849 in words is "three hundred seven million, two hundred sixteen thousand, eight hundred forty-nine".