646383579 has 4 divisors (see below), whose sum is σ = 861844776. Its totient is φ = 430922384.

The previous prime is 646383541. The next prime is 646383583. The reversal of 646383579 is 975383646.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 646383579 - 2¹⁷ = 646252507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (646383539) 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, 107730594 + ... + 107730599.

It is an arithmetic number, because the mean of its divisors is an integer number (215461194).

Almost surely, 2^646383579 is an apocalyptic number.

646383579 is a deficient number, since it is larger than the sum of its proper divisors (215461197).

646383579 is a wasteful number, since it uses less digits than its factorization.

646383579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215461196.

The product of its digits is 3265920, while the sum is 51.

The square root of 646383579 is about 25424.0747914255. The cubic root of 646383579 is about 864.6296114354.

The spelling of 646383579 in words is "six hundred forty-six million, three hundred eighty-three thousand, five hundred seventy-nine".