1228699387 has 2 divisors, whose sum is σ = 1228699388. Its totient is φ = 1228699386.

The previous prime is 1228699337. The next prime is 1228699447. The reversal of 1228699387 is 7839968221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1228699387 - 2¹⁹ = 1228175099 is a prime.

It is a super-2 number, since 2×1228699387² = 3019404367228351538, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1228699337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614349693 + 614349694.

It is an arithmetic number, because the mean of its divisors is an integer number (614349694).

Almost surely, 2^1228699387 is an apocalyptic number.

1228699387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228699387 is an equidigital number, since it uses as much as digits as its factorization.

1228699387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2612736, while the sum is 55.

The square root of 1228699387 is about 35052.8085465345. The cubic root of 1228699387 is about 1071.0634859753.

The spelling of 1228699387 in words is "one billion, two hundred twenty-eight million, six hundred ninety-nine thousand, three hundred eighty-seven".