309302734981 has 4 divisors (see below), whose sum is σ = 312778046700. Its totient is φ = 305827423264.

The previous prime is 309302734973. The next prime is 309302734999. The reversal of 309302734981 is 189437203903.

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

It can be written as a sum of positive squares in 2 ways, for example, as 194895760900 + 114406974081 = 441470^2 + 338241^2 .

It is a cyclic number.

It is not a de Polignac number, because 309302734981 - 2³ = 309302734973 is a prime.

It is a super-2 number, since 2×309302734981² (a number of 24 digits) 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 (309302734901) 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, 1737655726 + ... + 1737655903.

It is an arithmetic number, because the mean of its divisors is an integer number (78194511675).

Almost surely, 2^309302734981 is an apocalyptic number.

It is an amenable number.

309302734981 is a deficient number, since it is larger than the sum of its proper divisors (3475311719).

309302734981 is an equidigital number, since it uses as much as digits as its factorization.

309302734981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3475311718.

The product of its (nonzero) digits is 979776, while the sum is 49.

The spelling of 309302734981 in words is "three hundred nine billion, three hundred two million, seven hundred thirty-four thousand, nine hundred eighty-one".