685232487 has 8 divisors (see below), whose sum is σ = 1015159280. Its totient is φ = 456821640.

The previous prime is 685232461. The next prime is 685232497. The reversal of 685232487 is 784232586.

It is not a de Polignac number, because 685232487 - 2⁶ = 685232423 is a prime.

It is a super-2 number, since 2×685232487² = 939087122480410338, 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 (685232497) 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 7 ways as a sum of consecutive naturals, for example, 12689464 + ... + 12689517.

It is an arithmetic number, because the mean of its divisors is an integer number (126894910).

Almost surely, 2^685232487 is an apocalyptic number.

685232487 is a deficient number, since it is larger than the sum of its proper divisors (329926793).

685232487 is a wasteful number, since it uses less digits than its factorization.

685232487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25378990 (or 25378984 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 685232487 is about 26176.9457156483. The cubic root of 685232487 is about 881.6156986525.

Subtracting 685232487 from its reverse (784232586), we obtain a palindrome (99000099).

The spelling of 685232487 in words is "six hundred eighty-five million, two hundred thirty-two thousand, four hundred eighty-seven".