655304081 has 2 divisors, whose sum is σ = 655304082. Its totient is φ = 655304080.

The previous prime is 655303933. The next prime is 655304099. The reversal of 655304081 is 180403556.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 575040400 + 80263681 = 23980^2 + 8959^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-655304081 is a prime.

It is a super-2 number, since 2×655304081² = 858846877150509122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (655304981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327652040 + 327652041.

It is an arithmetic number, because the mean of its divisors is an integer number (327652041).

Almost surely, 2^655304081 is an apocalyptic number.

It is an amenable number.

655304081 is a deficient number, since it is larger than the sum of its proper divisors (1).

655304081 is an equidigital number, since it uses as much as digits as its factorization.

655304081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 655304081 is about 25598.9078087328. The cubic root of 655304081 is about 868.5889316079.

The spelling of 655304081 in words is "six hundred fifty-five million, three hundred four thousand, eighty-one".