685441287 has 12 divisors (see below), whose sum is σ = 992033640. Its totient is φ = 456060048.

The previous prime is 685441271. The next prime is 685441297. The reversal of 685441287 is 782144586.

It is not a de Polignac number, because 685441287 - 2⁴ = 685441271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685441297) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70233 + ... + 79394.

It is an arithmetic number, because the mean of its divisors is an integer number (82669470).

Almost surely, 2^685441287 is an apocalyptic number.

685441287 is a deficient number, since it is larger than the sum of its proper divisors (306592353).

685441287 is a wasteful number, since it uses less digits than its factorization.

685441287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150142 (or 150139 counting only the distinct ones).

The product of its digits is 430080, while the sum is 45.

The square root of 685441287 is about 26180.9336540926. The cubic root of 685441287 is about 881.7052364697.

The spelling of 685441287 in words is "six hundred eighty-five million, four hundred forty-one thousand, two hundred eighty-seven".