309056473 has 4 divisors (see below), whose sum is σ = 337152528. Its totient is φ = 280960420.

The previous prime is 309056471. The next prime is 309056477. The reversal of 309056473 is 374650903.

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 309056473 - 2¹ = 309056471 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (309056471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14048011 + ... + 14048032.

It is an arithmetic number, because the mean of its divisors is an integer number (84288132).

Almost surely, 2^309056473 is an apocalyptic number.

It is an amenable number.

309056473 is a deficient number, since it is larger than the sum of its proper divisors (28096055).

309056473 is a wasteful number, since it uses less digits than its factorization.

309056473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28096054.

The product of its (nonzero) digits is 68040, while the sum is 37.

The square root of 309056473 is about 17580.0020762229. The cubic root of 309056473 is about 676.1026134451.

The spelling of 309056473 in words is "three hundred nine million, fifty-six thousand, four hundred seventy-three".