655122919 has 6 divisors (see below), whose sum is σ = 720093920. Its totient is φ = 595566180.

The previous prime is 655122899. The next prime is 655122929. The reversal of 655122919 is 919221556.

655122919 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 655122919 - 2¹⁹ = 654598631 is a prime.

It is a super-2 number, since 2×655122919² = 858372077998161122, 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 (655122929) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2706999 + ... + 2707240.

Almost surely, 2^655122919 is an apocalyptic number.

655122919 is a deficient number, since it is larger than the sum of its proper divisors (64971001).

655122919 is a wasteful number, since it uses less digits than its factorization.

655122919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5414261 (or 5414250 counting only the distinct ones).

The product of its digits is 48600, while the sum is 40.

The square root of 655122919 is about 25595.3690928652. The cubic root of 655122919 is about 868.5088823527.

The spelling of 655122919 in words is "six hundred fifty-five million, one hundred twenty-two thousand, nine hundred nineteen".