306408961 has 4 divisors (see below), whose sum is σ = 306487300. Its totient is φ = 306330624.

The previous prime is 306408943. The next prime is 306408979. The reversal of 306408961 is 169804603.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (306408943) and next prime (306408979).

It can be written as a sum of positive squares in 2 ways, for example, as 255200625 + 51208336 = 15975^2 + 7156^2 .

It is a cyclic number.

It is not a de Polignac number, because 306408961 - 2⁹ = 306408449 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 306408961.

It is not an unprimeable number, because it can be changed into a prime (306408931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32976 + ... + 41233.

It is an arithmetic number, because the mean of its divisors is an integer number (76621825).

Almost surely, 2^306408961 is an apocalyptic number.

It is an amenable number.

306408961 is a deficient number, since it is larger than the sum of its proper divisors (78339).

306408961 is an equidigital number, since it uses as much as digits as its factorization.

306408961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78338.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 306408961 is about 17504.5411536550. The cubic root of 306408961 is about 674.1664780558.

It can be divided in two parts, 30640 and 8961, that added together give a square (39601 = 199²).

The spelling of 306408961 in words is "three hundred six million, four hundred eight thousand, nine hundred sixty-one".