1228367867 has 2 divisors, whose sum is σ = 1228367868. Its totient is φ = 1228367866.

The previous prime is 1228367863. The next prime is 1228367869. The reversal of 1228367867 is 7687638221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1228367867 - 2² = 1228367863 is a prime.

Together with 1228367869, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1228367863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614183933 + 614183934.

It is an arithmetic number, because the mean of its divisors is an integer number (614183934).

Almost surely, 2^1228367867 is an apocalyptic number.

1228367867 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228367867 is an equidigital number, since it uses as much as digits as its factorization.

1228367867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1354752, while the sum is 50.

The square root of 1228367867 is about 35048.0793624986. The cubic root of 1228367867 is about 1070.9671480887.

The spelling of 1228367867 in words is "one billion, two hundred twenty-eight million, three hundred sixty-seven thousand, eight hundred sixty-seven".