655490461 has 2 divisors, whose sum is σ = 655490462. Its totient is φ = 655490460.

The previous prime is 655490399. The next prime is 655490467. The reversal of 655490461 is 164094556.

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., 534072100 + 121418361 = 23110^2 + 11019^2 .

It is a cyclic number.

It is not a de Polignac number, because 655490461 - 2¹¹ = 655488413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (655490467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327745230 + 327745231.

It is an arithmetic number, because the mean of its divisors is an integer number (327745231).

Almost surely, 2^655490461 is an apocalyptic number.

It is an amenable number.

655490461 is a deficient number, since it is larger than the sum of its proper divisors (1).

655490461 is an equidigital number, since it uses as much as digits as its factorization.

655490461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 655490461 is about 25602.5479396094. The cubic root of 655490461 is about 868.6712711224.

The spelling of 655490461 in words is "six hundred fifty-five million, four hundred ninety thousand, four hundred sixty-one".