685101086 has 4 divisors (see below), whose sum is σ = 1027651632. Its totient is φ = 342550542.

The previous prime is 685101083. The next prime is 685101143. The reversal of 685101086 is 680101586.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 680101586 = 2 ⋅340050793.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685101083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171275270 + ... + 171275273.

It is an arithmetic number, because the mean of its divisors is an integer number (256912908).

Almost surely, 2^685101086 is an apocalyptic number.

685101086 is a deficient number, since it is larger than the sum of its proper divisors (342550546).

685101086 is a wasteful number, since it uses less digits than its factorization.

685101086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342550545.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 685101086 is about 26174.4357341281. The cubic root of 685101086 is about 881.5593418236.

It can be divided in two parts, 68510 and 1086, that added together give a palindrome (69596).

The spelling of 685101086 in words is "six hundred eighty-five million, one hundred one thousand, eighty-six".