686408403 has 4 divisors (see below), whose sum is σ = 915211208. Its totient is φ = 457605600.

The previous prime is 686408399. The next prime is 686408407. The reversal of 686408403 is 304804686.

686408403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (686408399) and next prime (686408407).

It is not a de Polignac number, because 686408403 - 2² = 686408399 is a prime.

It is a super-3 number, since 3×686408403³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (686408407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114401398 + ... + 114401403.

It is an arithmetic number, because the mean of its divisors is an integer number (228802802).

Almost surely, 2^686408403 is an apocalyptic number.

686408403 is a deficient number, since it is larger than the sum of its proper divisors (228802805).

686408403 is a wasteful number, since it uses less digits than its factorization.

686408403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228802804.

The product of its (nonzero) digits is 110592, while the sum is 39.

The square root of 686408403 is about 26199.3969968776. The cubic root of 686408403 is about 882.1197190960.

The spelling of 686408403 in words is "six hundred eighty-six million, four hundred eight thousand, four hundred three".