3678430729 has 4 divisors (see below), whose sum is σ = 3678556420. Its totient is φ = 3678305040.

The previous prime is 3678430711. The next prime is 3678430741. The reversal of 3678430729 is 9270348763.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2918160400 + 760270329 = 54020^2 + 27573^2 .

It is a cyclic number.

It is not a de Polignac number, because 3678430729 - 2¹³ = 3678422537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3678430529) 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, 6727 + ... + 86035.

It is an arithmetic number, because the mean of its divisors is an integer number (919639105).

Almost surely, 2^3678430729 is an apocalyptic number.

It is an amenable number.

3678430729 is a deficient number, since it is larger than the sum of its proper divisors (125691).

3678430729 is an equidigital number, since it uses as much as digits as its factorization.

3678430729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125690.

The product of its (nonzero) digits is 1524096, while the sum is 49.

The square root of 3678430729 is about 60650.0678400280. The cubic root of 3678430729 is about 1543.6690400067.

The spelling of 3678430729 in words is "three billion, six hundred seventy-eight million, four hundred thirty thousand, seven hundred twenty-nine".