685440141 has 4 divisors (see below), whose sum is σ = 913920192. Its totient is φ = 456960092.

The previous prime is 685440109. The next prime is 685440179. The reversal of 685440141 is 141044586.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 685440141 - 2⁵ = 685440109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685440241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114240021 + ... + 114240026.

It is an arithmetic number, because the mean of its divisors is an integer number (228480048).

Almost surely, 2^685440141 is an apocalyptic number.

It is an amenable number.

685440141 is a deficient number, since it is larger than the sum of its proper divisors (228480051).

685440141 is a wasteful number, since it uses less digits than its factorization.

685440141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228480050.

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 685440141 is about 26180.9117679274. The cubic root of 685440141 is about 881.7047450906.

The spelling of 685440141 in words is "six hundred eighty-five million, four hundred forty thousand, one hundred forty-one".