655338787 has 2 divisors, whose sum is σ = 655338788. Its totient is φ = 655338786.

The previous prime is 655338779. The next prime is 655338811. The reversal of 655338787 is 787833556.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 655338787 - 2³ = 655338779 is a prime.

It is not a weakly prime, because it can be changed into another prime (655338707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327669393 + 327669394.

It is an arithmetic number, because the mean of its divisors is an integer number (327669394).

Almost surely, 2^655338787 is an apocalyptic number.

655338787 is a deficient number, since it is larger than the sum of its proper divisors (1).

655338787 is an equidigital number, since it uses as much as digits as its factorization.

655338787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4233600, while the sum is 52.

The square root of 655338787 is about 25599.5856802410. The cubic root of 655338787 is about 868.6042653113.

The spelling of 655338787 in words is "six hundred fifty-five million, three hundred thirty-eight thousand, seven hundred eighty-seven".