306668431 has 4 divisors (see below), whose sum is σ = 306744664. Its totient is φ = 306592200.

The previous prime is 306668429. The next prime is 306668437. The reversal of 306668431 is 134866603.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134866603 = 2423 ⋅55661.

It is a cyclic number.

It is not a de Polignac number, because 306668431 - 2¹ = 306668429 is a prime.

It is a super-2 number, since 2×306668431² = 188091053144003522, 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 (306668437) 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, 31725 + ... + 40246.

It is an arithmetic number, because the mean of its divisors is an integer number (76686166).

Almost surely, 2^306668431 is an apocalyptic number.

306668431 is a deficient number, since it is larger than the sum of its proper divisors (76233).

306668431 is an equidigital number, since it uses as much as digits as its factorization.

306668431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76232.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 306668431 is about 17511.9510906124. The cubic root of 306668431 is about 674.3567212114.

The spelling of 306668431 in words is "three hundred six million, six hundred sixty-eight thousand, four hundred thirty-one".