655086491 has 2 divisors, whose sum is σ = 655086492. Its totient is φ = 655086490.

The previous prime is 655086469. The next prime is 655086511. The reversal of 655086491 is 194680556.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 655086491 - 2¹⁸ = 654824347 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (655086401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327543245 + 327543246.

It is an arithmetic number, because the mean of its divisors is an integer number (327543246).

Almost surely, 2^655086491 is an apocalyptic number.

655086491 is a deficient number, since it is larger than the sum of its proper divisors (1).

655086491 is an equidigital number, since it uses as much as digits as its factorization.

655086491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 655086491 is about 25594.6574698705. The cubic root of 655086491 is about 868.4927842908.

The spelling of 655086491 in words is "six hundred fifty-five million, eighty-six thousand, four hundred ninety-one".