655078417 has 4 divisors (see below), whose sum is σ = 748661056. Its totient is φ = 561495780.

The previous prime is 655078399. The next prime is 655078439. The reversal of 655078417 is 714870556.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 655078417 - 2¹⁹ = 654554129 is a prime.

It is a super-3 number, since 3×655078417³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655078217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46791309 + ... + 46791322.

It is an arithmetic number, because the mean of its divisors is an integer number (187165264).

Almost surely, 2^655078417 is an apocalyptic number.

It is an amenable number.

655078417 is a deficient number, since it is larger than the sum of its proper divisors (93582639).

655078417 is an equidigital number, since it uses as much as digits as its factorization.

655078417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93582638.

The product of its (nonzero) digits is 235200, while the sum is 43.

The square root of 655078417 is about 25594.4997411553. The cubic root of 655078417 is about 868.4892161922.

The spelling of 655078417 in words is "six hundred fifty-five million, seventy-eight thousand, four hundred seventeen".