655438831 has 8 divisors (see below), whose sum is σ = 696366720. Its totient is φ = 615732768.

The previous prime is 655438813. The next prime is 655438837. The reversal of 655438831 is 138834556.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 655438831 - 2²⁹ = 118567919 is a prime.

It is a super-2 number, since 2×655438831² = 859200122365293122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655438837) 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 7 ways as a sum of consecutive naturals, for example, 304351 + ... + 306496.

It is an arithmetic number, because the mean of its divisors is an integer number (87045840).

Almost surely, 2^655438831 is an apocalyptic number.

655438831 is a deficient number, since it is larger than the sum of its proper divisors (40927889).

655438831 is a wasteful number, since it uses less digits than its factorization.

655438831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610913.

The product of its digits is 345600, while the sum is 43.

The square root of 655438831 is about 25601.5396216712. The cubic root of 655438831 is about 868.6484634295.

The spelling of 655438831 in words is "six hundred fifty-five million, four hundred thirty-eight thousand, eight hundred thirty-one".