655642847 has 2 divisors, whose sum is σ = 655642848. Its totient is φ = 655642846.

The previous prime is 655642831. The next prime is 655642879. The reversal of 655642847 is 748246556.

655642847 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 655642847 - 2⁴ = 655642831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (655647847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327821423 + 327821424.

It is an arithmetic number, because the mean of its divisors is an integer number (327821424).

Almost surely, 2^655642847 is an apocalyptic number.

655642847 is a deficient number, since it is larger than the sum of its proper divisors (1).

655642847 is an equidigital number, since it uses as much as digits as its factorization.

655642847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1612800, while the sum is 47.

The square root of 655642847 is about 25605.5237595328. The cubic root of 655642847 is about 868.7385810690.

The spelling of 655642847 in words is "six hundred fifty-five million, six hundred forty-two thousand, eight hundred forty-seven".