1228859987 has 2 divisors, whose sum is σ = 1228859988. Its totient is φ = 1228859986.

The previous prime is 1228859959. The next prime is 1228859999. The reversal of 1228859987 is 7899588221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1228859987 - 2¹⁶ = 1228794451 is a prime.

It is not a weakly prime, because it can be changed into another prime (1228859917) 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, 614429993 + 614429994.

It is an arithmetic number, because the mean of its divisors is an integer number (614429994).

Almost surely, 2^1228859987 is an apocalyptic number.

1228859987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228859987 is an equidigital number, since it uses as much as digits as its factorization.

1228859987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5806080, while the sum is 59.

The square root of 1228859987 is about 35055.0993009576. The cubic root of 1228859987 is about 1071.1101492204.

The spelling of 1228859987 in words is "one billion, two hundred twenty-eight million, eight hundred fifty-nine thousand, nine hundred eighty-seven".