610001009 has 12 divisors (see below), whose sum is σ = 649737396. Its totient is φ = 572443872.

The previous prime is 610001003. The next prime is 610001027. The reversal of 610001009 is 900100016.

It can be written as a sum of positive squares in 2 ways, for example, as 508051600 + 101949409 = 22540^2 + 10097^2 .

It is not a de Polignac number, because 610001009 - 2²⁰ = 608952433 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (610001003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17159 + ... + 38915.

It is an arithmetic number, because the mean of its divisors is an integer number (54144783).

Almost surely, 2^610001009 is an apocalyptic number.

It is an amenable number.

610001009 is a deficient number, since it is larger than the sum of its proper divisors (39736387).

610001009 is a wasteful number, since it uses less digits than its factorization.

610001009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21856 (or 21833 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 610001009 is about 24698.1984970564. The cubic root of 610001009 is about 848.0930764581.

The spelling of 610001009 in words is "six hundred ten million, one thousand, nine".