655872097 has 2 divisors, whose sum is σ = 655872098. Its totient is φ = 655872096.

The previous prime is 655872073. The next prime is 655872103. The reversal of 655872097 is 790278556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 400160016 + 255712081 = 20004^2 + 15991^2 .

It is a cyclic number.

It is not a de Polignac number, because 655872097 - 2¹¹ = 655870049 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 655872097.

It is not a weakly prime, because it can be changed into another prime (655872017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327936048 + 327936049.

It is an arithmetic number, because the mean of its divisors is an integer number (327936049).

Almost surely, 2^655872097 is an apocalyptic number.

It is an amenable number.

655872097 is a deficient number, since it is larger than the sum of its proper divisors (1).

655872097 is an equidigital number, since it uses as much as digits as its factorization.

655872097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1058400, while the sum is 49.

The square root of 655872097 is about 25609.9999414291. Note that the first 4 decimals coincide. The cubic root of 655872097 is about 868.8398227296.

The spelling of 655872097 in words is "six hundred fifty-five million, eight hundred seventy-two thousand, ninety-seven".