685829258 has 4 divisors (see below), whose sum is σ = 1028743890. Its totient is φ = 342914628.

The previous prime is 685829237. The next prime is 685829267. The reversal of 685829258 is 852928586.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 495196009 + 190633249 = 22253^2 + 13807^2 .

It is a super-2 number, since 2×685829258² = 940723542257661128, which contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 171457313 + ... + 171457316.

Almost surely, 2^685829258 is an apocalyptic number.

685829258 is a deficient number, since it is larger than the sum of its proper divisors (342914632).

685829258 is a wasteful number, since it uses less digits than its factorization.

685829258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342914631.

The product of its digits is 2764800, while the sum is 53.

The square root of 685829258 is about 26188.3420246491. The cubic root of 685829258 is about 881.8715582972.

The spelling of 685829258 in words is "six hundred eighty-five million, eight hundred twenty-nine thousand, two hundred fifty-eight".