1686800134 has 4 divisors (see below), whose sum is σ = 2530200204. Its totient is φ = 843400066.

The previous prime is 1686800131. The next prime is 1686800149. The reversal of 1686800134 is 4310086861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4310086861 = 11489 ⋅375149.

It is a junction number, because it is equal to n+sod(n) for n = 1686800093 and 1686800102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1686800131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421700032 + ... + 421700035.

It is an arithmetic number, because the mean of its divisors is an integer number (632550051).

Almost surely, 2^1686800134 is an apocalyptic number.

1686800134 is a deficient number, since it is larger than the sum of its proper divisors (843400070).

1686800134 is an equidigital number, since it uses as much as digits as its factorization.

1686800134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843400069.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 1686800134 is about 41070.6724317974. The cubic root of 1686800134 is about 1190.3861783619.

Adding to 1686800134 its reverse (4310086861), we get a palindrome (5996886995).

The spelling of 1686800134 in words is "one billion, six hundred eighty-six million, eight hundred thousand, one hundred thirty-four".