309740169 has 4 divisors (see below), whose sum is σ = 412986896. Its totient is φ = 206493444.

The previous prime is 309740161. The next prime is 309740191. The reversal of 309740169 is 961047903.

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, and also an emirpimes, since its reverse is a distinct semiprime: 961047903 = 3 ⋅320349301.

It is not a de Polignac number, because 309740169 - 2³ = 309740161 is a prime.

It is a super-2 number, since 2×309740169² = 191877944584297122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (309740161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51623359 + ... + 51623364.

It is an arithmetic number, because the mean of its divisors is an integer number (103246724).

Almost surely, 2^309740169 is an apocalyptic number.

It is an amenable number.

309740169 is a deficient number, since it is larger than the sum of its proper divisors (103246727).

309740169 is a wasteful number, since it uses less digits than its factorization.

309740169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103246726.

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 309740169 is about 17599.4366103009. The cubic root of 309740169 is about 676.6008052517.

The spelling of 309740169 in words is "three hundred nine million, seven hundred forty thousand, one hundred sixty-nine".