606918109 has 4 divisors (see below), whose sum is σ = 693620704. Its totient is φ = 520215516.

The previous prime is 606918049. The next prime is 606918133. The reversal of 606918109 is 901819606.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 901819606 = 2 ⋅450909803.

It is a cyclic number.

It is not a de Polignac number, because 606918109 - 2⁷ = 606917981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (606918199) 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, 43351287 + ... + 43351300.

It is an arithmetic number, because the mean of its divisors is an integer number (173405176).

Almost surely, 2^606918109 is an apocalyptic number.

It is an amenable number.

606918109 is a deficient number, since it is larger than the sum of its proper divisors (86702595).

606918109 is an equidigital number, since it uses as much as digits as its factorization.

606918109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86702594.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 606918109 is about 24635.7080068749. The cubic root of 606918109 is about 846.6619295379.

The spelling of 606918109 in words is "six hundred six million, nine hundred eighteen thousand, one hundred nine".