306680887 has 4 divisors (see below), whose sum is σ = 317256120. Its totient is φ = 296105656.

The previous prime is 306680863. The next prime is 306680947. The reversal of 306680887 is 788086603.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 788086603 = 19139 ⋅41177.

It is a cyclic number.

It is not a de Polignac number, because 306680887 - 2²³ = 298292279 is a prime.

It is a super-2 number, since 2×306680887² = 188106332902213538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306680587) 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, 5287573 + ... + 5287630.

It is an arithmetic number, because the mean of its divisors is an integer number (79314030).

Almost surely, 2^306680887 is an apocalyptic number.

306680887 is a deficient number, since it is larger than the sum of its proper divisors (10575233).

306680887 is a wasteful number, since it uses less digits than its factorization.

306680887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10575232.

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 306680887 is about 17512.3067298400. The cubic root of 306680887 is about 674.3658512388.

The spelling of 306680887 in words is "three hundred six million, six hundred eighty thousand, eight hundred eighty-seven".