685562149 has 8 divisors (see below), whose sum is σ = 694572120. Its totient is φ = 676601856.

The previous prime is 685562131. The next prime is 685562177. The reversal of 685562149 is 941265586.

685562149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 471671524 + 213890625 = 21718^2 + 14625^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 685562149 - 2⁷ = 685562021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 685562099 and 685562108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685562249) 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, 15777 + ... + 40249.

It is an arithmetic number, because the mean of its divisors is an integer number (86821515).

Almost surely, 2^685562149 is an apocalyptic number.

It is an amenable number.

685562149 is a deficient number, since it is larger than the sum of its proper divisors (9009971).

685562149 is a wasteful number, since it uses less digits than its factorization.

685562149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24839.

The product of its digits is 518400, while the sum is 46.

The square root of 685562149 is about 26183.2417588044. The cubic root of 685562149 is about 881.7570563205.

The spelling of 685562149 in words is "six hundred eighty-five million, five hundred sixty-two thousand, one hundred forty-nine".