309934749 has 8 divisors (see below), whose sum is σ = 413430112. Its totient is φ = 206531280.

The previous prime is 309934747. The next prime is 309934777. The reversal of 309934749 is 947439903.

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

It is not a de Polignac number, because 309934749 - 2¹ = 309934747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 309934698 and 309934707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309934747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14674 + ... + 28899.

It is an arithmetic number, because the mean of its divisors is an integer number (51678764).

Almost surely, 2^309934749 is an apocalyptic number.

It is an amenable number.

309934749 is a deficient number, since it is larger than the sum of its proper divisors (103495363).

309934749 is a wasteful number, since it uses less digits than its factorization.

309934749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45947.

The product of its (nonzero) digits is 734832, while the sum is 48.

The square root of 309934749 is about 17604.9637602581. The cubic root of 309934749 is about 676.7424566951.

The spelling of 309934749 in words is "three hundred nine million, nine hundred thirty-four thousand, seven hundred forty-nine".