655998047 has 8 divisors (see below), whose sum is σ = 693077760. Its totient is φ = 619173720.

The previous prime is 655998043. The next prime is 655998097. The reversal of 655998047 is 740899556.

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 655998047 - 2² = 655998043 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 655998047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655998043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58553 + ... + 68850.

It is an arithmetic number, because the mean of its divisors is an integer number (86634720).

Almost surely, 2^655998047 is an apocalyptic number.

655998047 is a deficient number, since it is larger than the sum of its proper divisors (37079713).

655998047 is a wasteful number, since it uses less digits than its factorization.

655998047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127693.

The product of its (nonzero) digits is 2721600, while the sum is 53.

The square root of 655998047 is about 25612.4588237834. The cubic root of 655998047 is about 868.8954348793.

The spelling of 655998047 in words is "six hundred fifty-five million, nine hundred ninety-eight thousand, forty-seven".