306403423 has 4 divisors (see below), whose sum is σ = 313529128. Its totient is φ = 299277720.

The previous prime is 306403421. The next prime is 306403453. The reversal of 306403423 is 324304603.

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

It is a cyclic number.

It is not a de Polignac number, because 306403423 - 2¹ = 306403421 is a prime.

It is a super-2 number, since 2×306403423² = 187766115252233858, 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 (306403421) 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, 3562788 + ... + 3562873.

It is an arithmetic number, because the mean of its divisors is an integer number (78382282).

Almost surely, 2^306403423 is an apocalyptic number.

306403423 is a deficient number, since it is larger than the sum of its proper divisors (7125705).

306403423 is an equidigital number, since it uses as much as digits as its factorization.

306403423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7125704.

The product of its (nonzero) digits is 5184, while the sum is 25.

The square root of 306403423 is about 17504.3829654175. The cubic root of 306403423 is about 674.1624164291.

The spelling of 306403423 in words is "three hundred six million, four hundred three thousand, four hundred twenty-three".