655899117 has 32 divisors (see below), whose sum is σ = 948205440. Its totient is φ = 401786880.

The previous prime is 655899091. The next prime is 655899131. The reversal of 655899117 is 711998556.

It is not a de Polignac number, because 655899117 - 2¹¹ = 655897069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 655899117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655899187) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 375867 + ... + 377607.

It is an arithmetic number, because the mean of its divisors is an integer number (29631420).

Almost surely, 2^655899117 is an apocalyptic number.

It is an amenable number.

655899117 is a deficient number, since it is larger than the sum of its proper divisors (292306323).

655899117 is a wasteful number, since it uses less digits than its factorization.

655899117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1933.

The product of its digits is 680400, while the sum is 51.

The square root of 655899117 is about 25610.5274643065. The cubic root of 655899117 is about 868.8517537803.

The spelling of 655899117 in words is "six hundred fifty-five million, eight hundred ninety-nine thousand, one hundred seventeen".