309006145 has 8 divisors (see below), whose sum is σ = 423779904. Its totient is φ = 211889904.

The previous prime is 309006143. The next prime is 309006149. The reversal of 309006145 is 541600903.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 309006145 - 2¹ = 309006143 is a prime.

It is a super-2 number, since 2×309006145² = 190969595295522050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (309006143) 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 7 ways as a sum of consecutive naturals, for example, 4414339 + ... + 4414408.

It is an arithmetic number, because the mean of its divisors is an integer number (52972488).

Almost surely, 2^309006145 is an apocalyptic number.

309006145 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

309006145 is a deficient number, since it is larger than the sum of its proper divisors (114773759).

309006145 is an equidigital number, since it uses as much as digits as its factorization.

309006145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8828759.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 309006145 is about 17578.5706187961. The cubic root of 309006145 is about 676.0659116959.

The spelling of 309006145 in words is "three hundred nine million, six thousand, one hundred forty-five".