318029749 has 4 divisors (see below), whose sum is σ = 318479020. Its totient is φ = 317580480.

The previous prime is 318029741. The next prime is 318029753. The reversal of 318029749 is 947920813.

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 153933649 + 164096100 = 12407^2 + 12810^2 .

It is a cyclic number.

It is not a de Polignac number, because 318029749 - 2³ = 318029741 is a prime.

It is a super-2 number, since 2×318029749² = 202285842498006002, 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 (318029741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223572 + ... + 224989.

It is an arithmetic number, because the mean of its divisors is an integer number (79619755).

Almost surely, 2^318029749 is an apocalyptic number.

It is an amenable number.

318029749 is a deficient number, since it is larger than the sum of its proper divisors (449271).

318029749 is an equidigital number, since it uses as much as digits as its factorization.

318029749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449270.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 318029749 is about 17833.3886011605. The cubic root of 318029749 is about 682.5837036350.

The spelling of 318029749 in words is "three hundred eighteen million, twenty-nine thousand, seven hundred forty-nine".