571649009 has 4 divisors (see below), whose sum is σ = 584943216. Its totient is φ = 558354804.

The previous prime is 571648999. The next prime is 571649011. The reversal of 571649009 is 900946175.

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.

It is a cyclic number.

It is not a de Polignac number, because 571649009 - 2⁴ = 571648993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (571649059) 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, 6647039 + ... + 6647124.

It is an arithmetic number, because the mean of its divisors is an integer number (146235804).

Almost surely, 2^571649009 is an apocalyptic number.

It is an amenable number.

571649009 is a deficient number, since it is larger than the sum of its proper divisors (13294207).

571649009 is a wasteful number, since it uses less digits than its factorization.

571649009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13294206.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 571649009 is about 23909.1825247121. The cubic root of 571649009 is about 829.9332258663.

The spelling of 571649009 in words is "five hundred seventy-one million, six hundred forty-nine thousand, nine".