686438097 has 8 divisors (see below), whose sum is σ = 939987456. Its totient is φ = 445257072.

The previous prime is 686438047. The next prime is 686438101. The reversal of 686438097 is 790834686.

686438097 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 686438097 - 2⁸ = 686437841 is a prime.

It is a super-2 number, since 2×686438097² = 942394522025962818, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (686438047) 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, 3091953 + ... + 3092174.

It is an arithmetic number, because the mean of its divisors is an integer number (117498432).

Almost surely, 2^686438097 is an apocalyptic number.

It is an amenable number.

686438097 is a deficient number, since it is larger than the sum of its proper divisors (253549359).

686438097 is a wasteful number, since it uses less digits than its factorization.

686438097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6184167.

The product of its (nonzero) digits is 1741824, while the sum is 51.

The square root of 686438097 is about 26199.9636831809. The cubic root of 686438097 is about 882.1324390671.

The spelling of 686438097 in words is "six hundred eighty-six million, four hundred thirty-eight thousand, ninety-seven".