655633439 has 2 divisors, whose sum is σ = 655633440. Its totient is φ = 655633438.

The previous prime is 655633417. The next prime is 655633457. The reversal of 655633439 is 934336556.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 655633439 - 2¹² = 655629343 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 655633439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (655633499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327816719 + 327816720.

It is an arithmetic number, because the mean of its divisors is an integer number (327816720).

Almost surely, 2^655633439 is an apocalyptic number.

655633439 is a deficient number, since it is larger than the sum of its proper divisors (1).

655633439 is an equidigital number, since it uses as much as digits as its factorization.

655633439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 874800, while the sum is 44.

The square root of 655633439 is about 25605.3400485133. The cubic root of 655633439 is about 868.7344257926.

The spelling of 655633439 in words is "six hundred fifty-five million, six hundred thirty-three thousand, four hundred thirty-nine".