1206609685 has 8 divisors (see below), whose sum is σ = 1448165376. Its totient is φ = 965131920.

The previous prime is 1206609673. The next prime is 1206609727. The reversal of 1206609685 is 5869066021.

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

It is not a de Polignac number, because 1206609685 - 2¹⁷ = 1206478613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23020 + ... + 54250.

It is an arithmetic number, because the mean of its divisors is an integer number (181020672).

Almost surely, 2^1206609685 is an apocalyptic number.

It is an amenable number.

1206609685 is a deficient number, since it is larger than the sum of its proper divisors (241555691).

1206609685 is an equidigital number, since it uses as much as digits as its factorization.

1206609685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38963.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 1206609685 is about 34736.2877262381. The cubic root of 1206609685 is about 1064.6060641241.

The spelling of 1206609685 in words is "one billion, two hundred six million, six hundred nine thousand, six hundred eighty-five".