655298139 has 4 divisors (see below), whose sum is σ = 873730856. Its totient is φ = 436865424.

The previous prime is 655298117. The next prime is 655298143. The reversal of 655298139 is 931892556.

It is a happy number.

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

It is not a de Polignac number, because 655298139 - 2⁹ = 655297627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655298159) 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, 109216354 + ... + 109216359.

It is an arithmetic number, because the mean of its divisors is an integer number (218432714).

Almost surely, 2^655298139 is an apocalyptic number.

655298139 is a deficient number, since it is larger than the sum of its proper divisors (218432717).

655298139 is a wasteful number, since it uses less digits than its factorization.

655298139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218432716.

The product of its digits is 583200, while the sum is 48.

The square root of 655298139 is about 25598.7917488306. The cubic root of 655298139 is about 868.5863062765.

The spelling of 655298139 in words is "six hundred fifty-five million, two hundred ninety-eight thousand, one hundred thirty-nine".