305386949 has 4 divisors (see below), whose sum is σ = 349013664. Its totient is φ = 261760236.

The previous prime is 305386909. The next prime is 305386969. The reversal of 305386949 is 949683503.

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: 949683503 = 29 ⋅32747707.

It is a cyclic number.

It is not a de Polignac number, because 305386949 - 2²⁴ = 288609733 is a prime.

It is a super-2 number, since 2×305386949² = 186522377239057202, which 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 (305386909) 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, 21813347 + ... + 21813360.

It is an arithmetic number, because the mean of its divisors is an integer number (87253416).

Almost surely, 2^305386949 is an apocalyptic number.

It is an amenable number.

305386949 is a deficient number, since it is larger than the sum of its proper divisors (43626715).

305386949 is an equidigital number, since it uses as much as digits as its factorization.

305386949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43626714.

The product of its (nonzero) digits is 699840, while the sum is 47.

The square root of 305386949 is about 17475.3240027188. The cubic root of 305386949 is about 673.4160934502.

The spelling of 305386949 in words is "three hundred five million, three hundred eighty-six thousand, nine hundred forty-nine".