655145399 has 2 divisors, whose sum is σ = 655145400. Its totient is φ = 655145398.

The previous prime is 655145353. The next prime is 655145423. The reversal of 655145399 is 993541556.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-655145399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (655145299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327572699 + 327572700.

It is an arithmetic number, because the mean of its divisors is an integer number (327572700).

Almost surely, 2^655145399 is an apocalyptic number.

655145399 is a deficient number, since it is larger than the sum of its proper divisors (1).

655145399 is an equidigital number, since it uses as much as digits as its factorization.

655145399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 729000, while the sum is 47.

The square root of 655145399 is about 25595.8082310366. The cubic root of 655145399 is about 868.5188162932.

The spelling of 655145399 in words is "six hundred fifty-five million, one hundred forty-five thousand, three hundred ninety-nine".