655917329 has 4 divisors (see below), whose sum is σ = 664220160. Its totient is φ = 647614500.

The previous prime is 655917319. The next prime is 655917359. The reversal of 655917329 is 923719556.

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 655917329 - 2¹² = 655913233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655917319) 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, 4151297 + ... + 4151454.

It is an arithmetic number, because the mean of its divisors is an integer number (166055040).

Almost surely, 2^655917329 is an apocalyptic number.

It is an amenable number.

655917329 is a deficient number, since it is larger than the sum of its proper divisors (8302831).

655917329 is an equidigital number, since it uses as much as digits as its factorization.

655917329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8302830.

The product of its digits is 510300, while the sum is 47.

The square root of 655917329 is about 25610.8830187481. The cubic root of 655917329 is about 868.8597953532.

The spelling of 655917329 in words is "six hundred fifty-five million, nine hundred seventeen thousand, three hundred twenty-nine".