686035429 has 4 divisors (see below), whose sum is σ = 686306284. Its totient is φ = 685764576.

The previous prime is 686035423. The next prime is 686035433. The reversal of 686035429 is 924530686.

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 457874404 + 228161025 = 21398^2 + 15105^2 .

It is a cyclic number.

It is not a de Polignac number, because 686035429 - 2²³ = 677646821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686035423) 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, 131592 + ... + 136705.

It is an arithmetic number, because the mean of its divisors is an integer number (171576571).

Almost surely, 2^686035429 is an apocalyptic number.

It is an amenable number.

686035429 is a deficient number, since it is larger than the sum of its proper divisors (270855).

686035429 is a wasteful number, since it uses less digits than its factorization.

686035429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270854.

The product of its (nonzero) digits is 311040, while the sum is 43.

The square root of 686035429 is about 26192.2780414381. The cubic root of 686035429 is about 881.9599175708.

The spelling of 686035429 in words is "six hundred eighty-six million, thirty-five thousand, four hundred twenty-nine".