606591649 has 4 divisors (see below), whose sum is σ = 612156820. Its totient is φ = 601026480.

The previous prime is 606591647. The next prime is 606591677. The reversal of 606591649 is 946195606.

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 492529249 + 114062400 = 22193^2 + 10680^2 .

It is a cyclic number.

It is not a de Polignac number, because 606591649 - 2¹ = 606591647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 606591599 and 606591608.

It is not an unprimeable number, because it can be changed into a prime (606591641) 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, 2782422 + ... + 2782639.

It is an arithmetic number, because the mean of its divisors is an integer number (153039205).

Almost surely, 2^606591649 is an apocalyptic number.

It is an amenable number.

606591649 is a deficient number, since it is larger than the sum of its proper divisors (5565171).

606591649 is a wasteful number, since it uses less digits than its factorization.

606591649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5565170.

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 606591649 is about 24629.0813673592. The cubic root of 606591649 is about 846.5100964088.

The spelling of 606591649 in words is "six hundred six million, five hundred ninety-one thousand, six hundred forty-nine".