685136101 has 8 divisors (see below), whose sum is σ = 738053624. Its totient is φ = 632249280.

The previous prime is 685136083. The next prime is 685136119. The reversal of 685136101 is 101631586.

685136101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (685136083) and next prime (685136119).

It can be written as a sum of positive squares in 4 ways, for example, as 5476 + 685130625 = 74^2 + 26175^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 685136101 - 2⁵ = 685136069 is a prime.

It is a super-2 number, since 2×685136101² = 938822953786964402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685136131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62491 + ... + 72631.

It is an arithmetic number, because the mean of its divisors is an integer number (92256703).

Almost surely, 2^685136101 is an apocalyptic number.

It is an amenable number.

685136101 is a deficient number, since it is larger than the sum of its proper divisors (52917523).

685136101 is a wasteful number, since it uses less digits than its factorization.

685136101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15351.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 685136101 is about 26175.1046034204. The cubic root of 685136101 is about 881.5743601788.

Adding to 685136101 its reverse (101631586), we get a palindrome (786767687).

The spelling of 685136101 in words is "six hundred eighty-five million, one hundred thirty-six thousand, one hundred one".