306404493 has 4 divisors (see below), whose sum is σ = 408539328. Its totient is φ = 204269660.

The previous prime is 306404491. The next prime is 306404509. The reversal of 306404493 is 394404603.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 306404493 - 2¹ = 306404491 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306404491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51067413 + ... + 51067418.

It is an arithmetic number, because the mean of its divisors is an integer number (102134832).

Almost surely, 2^306404493 is an apocalyptic number.

It is an amenable number.

306404493 is a deficient number, since it is larger than the sum of its proper divisors (102134835).

306404493 is a wasteful number, since it uses less digits than its factorization.

306404493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102134834.

The product of its (nonzero) digits is 31104, while the sum is 33.

The square root of 306404493 is about 17504.4135291646. The cubic root of 306404493 is about 674.1632011820.

The spelling of 306404493 in words is "three hundred six million, four hundred four thousand, four hundred ninety-three".