686533142 has 4 divisors (see below), whose sum is σ = 1029799716. Its totient is φ = 343266570.

The previous prime is 686533129. The next prime is 686533189. The reversal of 686533142 is 241335686.

686533142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 241335686 = 2 ⋅120667843.

It is a junction number, because it is equal to n+sod(n) for n = 686533096 and 686533105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171633284 + ... + 171633287.

It is an arithmetic number, because the mean of its divisors is an integer number (257449929).

Almost surely, 2^686533142 is an apocalyptic number.

686533142 is a deficient number, since it is larger than the sum of its proper divisors (343266574).

686533142 is a wasteful number, since it uses less digits than its factorization.

686533142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343266573.

The product of its digits is 103680, while the sum is 38.

The square root of 686533142 is about 26201.7774587908. Note that the first 3 decimals coincide. The cubic root of 686533142 is about 882.1731508753.

The spelling of 686533142 in words is "six hundred eighty-six million, five hundred thirty-three thousand, one hundred forty-two".