207400685 has 4 divisors (see below), whose sum is σ = 248880828. Its totient is φ = 165920544.

The previous prime is 207400681. The next prime is 207400693. The reversal of 207400685 is 586004702.

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

It can be written as a sum of positive squares in 2 ways, for example, as 114875524 + 92525161 = 10718^2 + 9619^2 .

It is a cyclic number.

It is not a de Polignac number, because 207400685 - 2² = 207400681 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (207400681) 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 3 ways as a sum of consecutive naturals, for example, 20740064 + ... + 20740073.

It is an arithmetic number, because the mean of its divisors is an integer number (62220207).

Almost surely, 2^207400685 is an apocalyptic number.

It is an amenable number.

207400685 is a deficient number, since it is larger than the sum of its proper divisors (41480143).

207400685 is an equidigital number, since it uses as much as digits as its factorization.

207400685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41480142.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 207400685 is about 14401.4126043246. The cubic root of 207400685 is about 591.9296058936.

The spelling of 207400685 in words is "two hundred seven million, four hundred thousand, six hundred eighty-five".