1288738223 has 2 divisors, whose sum is σ = 1288738224. Its totient is φ = 1288738222.

The previous prime is 1288738189. The next prime is 1288738249. The reversal of 1288738223 is 3228378821.

It is a strong prime.

It is an emirp because it is prime and its reverse (3228378821) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1288738223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1288738523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 644369111 + 644369112.

It is an arithmetic number, because the mean of its divisors is an integer number (644369112).

Almost surely, 2^1288738223 is an apocalyptic number.

1288738223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1288738223 is an equidigital number, since it uses as much as digits as its factorization.

1288738223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 258048, while the sum is 44.

The square root of 1288738223 is about 35899.0003064152. Note that the first 3 decimals coincide. The cubic root of 1288738223 is about 1088.2321940701.

The spelling of 1288738223 in words is "one billion, two hundred eighty-eight million, seven hundred thirty-eight thousand, two hundred twenty-three".