1223136487 has 2 divisors, whose sum is σ = 1223136488. Its totient is φ = 1223136486.

The previous prime is 1223136443. The next prime is 1223136511. The reversal of 1223136487 is 7846313221.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (7846313221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1223136487 - 2⁷ = 1223136359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223136407) 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, 611568243 + 611568244.

It is an arithmetic number, because the mean of its divisors is an integer number (611568244).

Almost surely, 2^1223136487 is an apocalyptic number.

1223136487 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223136487 is an equidigital number, since it uses as much as digits as its factorization.

1223136487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 37.

The square root of 1223136487 is about 34973.3682535726. The cubic root of 1223136487 is about 1069.4446377034. Note that the first 3 decimals are identical.

The spelling of 1223136487 in words is "one billion, two hundred twenty-three million, one hundred thirty-six thousand, four hundred eighty-seven".