655490459 has 4 divisors (see below), whose sum is σ = 705912816. Its totient is φ = 605068104.

The previous prime is 655490399. The next prime is 655490461. The reversal of 655490459 is 954094556.

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

It is a cyclic number.

It is not a de Polignac number, because 655490459 - 2²⁰ = 654441883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655490359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25211159 + ... + 25211184.

It is an arithmetic number, because the mean of its divisors is an integer number (176478204).

Almost surely, 2^655490459 is an apocalyptic number.

655490459 is a deficient number, since it is larger than the sum of its proper divisors (50422357).

655490459 is a wasteful number, since it uses less digits than its factorization.

655490459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50422356.

The product of its (nonzero) digits is 972000, while the sum is 47.

The square root of 655490459 is about 25602.5479005508. The cubic root of 655490459 is about 868.6712702389.

The spelling of 655490459 in words is "six hundred fifty-five million, four hundred ninety thousand, four hundred fifty-nine".