309385479412 has 6 divisors (see below), whose sum is σ = 541424588978. Its totient is φ = 154692739704.

The previous prime is 309385479401. The next prime is 309385479419. The reversal of 309385479412 is 214974583903.

It can be written as a sum of positive squares in only one way, i.e., 194061394576 + 115324084836 = 440524^2 + 339594^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309385479419) 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 as a sum of consecutive naturals, namely, 38673184923 + ... + 38673184930.

Almost surely, 2^309385479412 is an apocalyptic number.

It is an amenable number.

309385479412 is a deficient number, since it is larger than the sum of its proper divisors (232039109566).

309385479412 is a wasteful number, since it uses less digits than its factorization.

309385479412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77346369857 (or 77346369855 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 55.

The spelling of 309385479412 in words is "three hundred nine billion, three hundred eighty-five million, four hundred seventy-nine thousand, four hundred twelve".