655145123 has 2 divisors, whose sum is σ = 655145124. Its totient is φ = 655145122.

The previous prime is 655145093. The next prime is 655145149. The reversal of 655145123 is 321541556.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 655145123 - 2¹⁰ = 655144099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 655145123.

It is not a weakly prime, because it can be changed into another prime (655145423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327572561 + 327572562.

It is an arithmetic number, because the mean of its divisors is an integer number (327572562).

Almost surely, 2^655145123 is an apocalyptic number.

655145123 is a deficient number, since it is larger than the sum of its proper divisors (1).

655145123 is an equidigital number, since it uses as much as digits as its factorization.

655145123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18000, while the sum is 32.

The square root of 655145123 is about 25595.8028395282. The cubic root of 655145123 is about 868.5186943299.

Adding to 655145123 its reverse (321541556), we get a palindrome (976686679).

The spelling of 655145123 in words is "six hundred fifty-five million, one hundred forty-five thousand, one hundred twenty-three".