655477247 has 4 divisors (see below), whose sum is σ = 655539456. Its totient is φ = 655415040.

The previous prime is 655477241. The next prime is 655477261. The reversal of 655477247 is 742774556.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 655477247 - 2¹⁸ = 655215103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655477241) 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, 10943 + ... + 37824.

It is an arithmetic number, because the mean of its divisors is an integer number (163884864).

Almost surely, 2^655477247 is an apocalyptic number.

655477247 is a deficient number, since it is larger than the sum of its proper divisors (62209).

655477247 is a wasteful number, since it uses less digits than its factorization.

655477247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62208.

The product of its digits is 1646400, while the sum is 47.

The square root of 655477247 is about 25602.2898780558. The cubic root of 655477247 is about 868.6654339160.

The spelling of 655477247 in words is "six hundred fifty-five million, four hundred seventy-seven thousand, two hundred forty-seven".