655940579 has 4 divisors (see below), whose sum is σ = 749646384. Its totient is φ = 562234776.

The previous prime is 655940573. The next prime is 655940609. The reversal of 655940579 is 975049556.

It is a happy number.

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 655940579 - 2⁸ = 655940323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655940573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46852892 + ... + 46852905.

It is an arithmetic number, because the mean of its divisors is an integer number (187411596).

Almost surely, 2^655940579 is an apocalyptic number.

655940579 is a deficient number, since it is larger than the sum of its proper divisors (93705805).

655940579 is an equidigital number, since it uses as much as digits as its factorization.

655940579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93705804.

The product of its (nonzero) digits is 1701000, while the sum is 50.

The square root of 655940579 is about 25611.3369233236. The cubic root of 655940579 is about 868.8700612564.

The spelling of 655940579 in words is "six hundred fifty-five million, nine hundred forty thousand, five hundred seventy-nine".