655394687 has 2 divisors, whose sum is σ = 655394688. Its totient is φ = 655394686.

The previous prime is 655394671. The next prime is 655394699. The reversal of 655394687 is 786493556.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 655394687 - 2⁴ = 655394671 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (655394617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327697343 + 327697344.

It is an arithmetic number, because the mean of its divisors is an integer number (327697344).

Almost surely, 2^655394687 is an apocalyptic number.

655394687 is a deficient number, since it is larger than the sum of its proper divisors (1).

655394687 is an equidigital number, since it uses as much as digits as its factorization.

655394687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5443200, while the sum is 53.

The square root of 655394687 is about 25600.6774715045. The cubic root of 655394687 is about 868.6289617477.

The spelling of 655394687 in words is "six hundred fifty-five million, three hundred ninety-four thousand, six hundred eighty-seven".