306979 has 4 divisors (see below), whose sum is σ = 308176. Its totient is φ = 305784.

The previous prime is 306953. The next prime is 306991. The reversal of 306979 is 979603.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 979603 = 97 ⋅10099.

It is a cyclic number.

It is not a de Polignac number, because 306979 - 2⁵ = 306947 is a prime.

It is a super-2 number, since 2×306979² = 188472212882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (306919) 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, 39 + ... + 784.

It is an arithmetic number, because the mean of its divisors is an integer number (77044).

2³⁰⁶⁹⁷⁹ is an apocalyptic number.

306979 is a deficient number, since it is larger than the sum of its proper divisors (1197).

306979 is an equidigital number, since it uses as much as digits as its factorization.

306979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196.

The product of its (nonzero) digits is 10206, while the sum is 34.

The square root of 306979 is about 554.0568562882. The cubic root of 306979 is about 67.4584289068.

The spelling of 306979 in words is "three hundred six thousand, nine hundred seventy-nine".