655992127 has 4 divisors (see below), whose sum is σ = 749705296. Its totient is φ = 562278960.

The previous prime is 655992121. The next prime is 655992167. The reversal of 655992127 is 721299556.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 655992127 - 2¹¹ = 655990079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655992121) 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 in 3 ways as a sum of consecutive naturals, for example, 46856574 + ... + 46856587.

It is an arithmetic number, because the mean of its divisors is an integer number (187426324).

Almost surely, 2^655992127 is an apocalyptic number.

655992127 is a deficient number, since it is larger than the sum of its proper divisors (93713169).

655992127 is an equidigital number, since it uses as much as digits as its factorization.

655992127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93713168.

The product of its digits is 340200, while the sum is 46.

The square root of 655992127 is about 25612.3432547668. The cubic root of 655992127 is about 868.8928211131.

The spelling of 655992127 in words is "six hundred fifty-five million, nine hundred ninety-two thousand, one hundred twenty-seven".