685554107 has 4 divisors (see below), whose sum is σ = 783490416. Its totient is φ = 587617800.

The previous prime is 685554101. The next prime is 685554131. The reversal of 685554107 is 701455586.

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

It is not a de Polignac number, because 685554107 - 2⁴ = 685554091 is a prime.

It is a super-3 number, since 3×685554107³ (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 (685554101) 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, 48968144 + ... + 48968157.

It is an arithmetic number, because the mean of its divisors is an integer number (195872604).

Almost surely, 2^685554107 is an apocalyptic number.

685554107 is a deficient number, since it is larger than the sum of its proper divisors (97936309).

685554107 is an equidigital number, since it uses as much as digits as its factorization.

685554107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97936308.

The product of its (nonzero) digits is 168000, while the sum is 41.

The square root of 685554107 is about 26183.0881868430. The cubic root of 685554107 is about 881.7536084843.

The spelling of 685554107 in words is "six hundred eighty-five million, five hundred fifty-four thousand, one hundred seven".