655920245 has 4 divisors (see below), whose sum is σ = 787104300. Its totient is φ = 524736192.

The previous prime is 655920241. The next prime is 655920247. The reversal of 655920245 is 542029556.

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

It can be written as a sum of positive squares in 2 ways, for example, as 248566756 + 407353489 = 15766^2 + 20183^2 .

It is a cyclic number.

It is not a de Polignac number, because 655920245 - 2² = 655920241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 655920199 and 655920208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655920241) 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, 65592020 + ... + 65592029.

It is an arithmetic number, because the mean of its divisors is an integer number (196776075).

Almost surely, 2^655920245 is an apocalyptic number.

It is an amenable number.

655920245 is a deficient number, since it is larger than the sum of its proper divisors (131184055).

655920245 is a wasteful number, since it uses less digits than its factorization.

655920245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131184054.

The product of its (nonzero) digits is 108000, while the sum is 38.

The square root of 655920245 is about 25610.9399476083. The cubic root of 655920245 is about 868.8610829094.

The spelling of 655920245 in words is "six hundred fifty-five million, nine hundred twenty thousand, two hundred forty-five".