612009509 has 8 divisors (see below), whose sum is σ = 615927840. Its totient is φ = 608101200.

The previous prime is 612009473. The next prime is 612009511. The reversal of 612009509 is 905900216.

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

It is a cyclic number.

It is not a de Polignac number, because 612009509 - 2⁸ = 612009253 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 (612009529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147554 + ... + 151644.

It is an arithmetic number, because the mean of its divisors is an integer number (76990980).

Almost surely, 2^612009509 is an apocalyptic number.

It is an amenable number.

612009509 is a deficient number, since it is larger than the sum of its proper divisors (3918331).

612009509 is a wasteful number, since it uses less digits than its factorization.

612009509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5011.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 612009509 is about 24738.8259422310. The cubic root of 612009509 is about 849.0228720861.

The spelling of 612009509 in words is "six hundred twelve million, nine thousand, five hundred nine".