655516439 has 2 divisors, whose sum is σ = 655516440. Its totient is φ = 655516438.

The previous prime is 655516423. The next prime is 655516471. The reversal of 655516439 is 934615556.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 655516439 - 2⁴ = 655516423 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 655516439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (655516489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327758219 + 327758220.

It is an arithmetic number, because the mean of its divisors is an integer number (327758220).

Almost surely, 2^655516439 is an apocalyptic number.

655516439 is a deficient number, since it is larger than the sum of its proper divisors (1).

655516439 is an equidigital number, since it uses as much as digits as its factorization.

655516439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 486000, while the sum is 44.

The square root of 655516439 is about 25603.0552669013. The cubic root of 655516439 is about 868.6827465216.

The spelling of 655516439 in words is "six hundred fifty-five million, five hundred sixteen thousand, four hundred thirty-nine".