655211279 has 4 divisors (see below), whose sum is σ = 657930240. Its totient is φ = 652492320.

The previous prime is 655211273. The next prime is 655211287. The reversal of 655211279 is 972112556.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-655211279 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 (655211273) 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, 1359119 + ... + 1359600.

It is an arithmetic number, because the mean of its divisors is an integer number (164482560).

Almost surely, 2^655211279 is an apocalyptic number.

655211279 is a deficient number, since it is larger than the sum of its proper divisors (2718961).

655211279 is a wasteful number, since it uses less digits than its factorization.

655211279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2718960.

The product of its digits is 37800, while the sum is 38.

The square root of 655211279 is about 25597.0951281586. The cubic root of 655211279 is about 868.5479274401.

The spelling of 655211279 in words is "six hundred fifty-five million, two hundred eleven thousand, two hundred seventy-nine".