306478961 has 4 divisors (see below), whose sum is σ = 306589092. Its totient is φ = 306368832.

The previous prime is 306478951. The next prime is 306478973. The reversal of 306478961 is 169874603.

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

It can be written as a sum of positive squares in 2 ways, for example, as 91680625 + 214798336 = 9575^2 + 14656^2 .

It is a cyclic number.

It is not a de Polignac number, because 306478961 - 2¹⁰ = 306477937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (306478951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50780 + ... + 56493.

It is an arithmetic number, because the mean of its divisors is an integer number (76647273).

Almost surely, 2^306478961 is an apocalyptic number.

It is an amenable number.

306478961 is a deficient number, since it is larger than the sum of its proper divisors (110131).

306478961 is a wasteful number, since it uses less digits than its factorization.

306478961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110130.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 306478961 is about 17506.5405206169. The cubic root of 306478961 is about 674.2178125642.

The spelling of 306478961 in words is "three hundred six million, four hundred seventy-eight thousand, nine hundred sixty-one".