685493015 has 8 divisors (see below), whose sum is σ = 822750720. Its totient is φ = 548288352.

The previous prime is 685493009. The next prime is 685493021. The reversal of 685493015 is 510394586.

It is an interprime number because it is at equal distance from previous prime (685493009) and next prime (685493021).

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 685493015 - 2¹⁰ = 685491991 is a prime.

It is a super-2 number, since 2×685493015² = 939801347227580450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 25457 + ... + 44933.

It is an arithmetic number, because the mean of its divisors is an integer number (102843840).

Almost surely, 2^685493015 is an apocalyptic number.

685493015 is a deficient number, since it is larger than the sum of its proper divisors (137257705).

685493015 is a wasteful number, since it uses less digits than its factorization.

685493015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26521.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 685493015 is about 26181.9215299412. The cubic root of 685493015 is about 881.7274157101.

The spelling of 685493015 in words is "six hundred eighty-five million, four hundred ninety-three thousand, fifteen".