1229667871 has 2 divisors, whose sum is σ = 1229667872. Its totient is φ = 1229667870.

The previous prime is 1229667839. The next prime is 1229667899. The reversal of 1229667871 is 1787669221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1229667871 - 2⁵ = 1229667839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1229667371) 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, 614833935 + 614833936.

It is an arithmetic number, because the mean of its divisors is an integer number (614833936).

Almost surely, 2^1229667871 is an apocalyptic number.

1229667871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1229667871 is an equidigital number, since it uses as much as digits as its factorization.

1229667871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 49.

The square root of 1229667871 is about 35066.6204673333. The cubic root of 1229667871 is about 1071.3448228745.

The spelling of 1229667871 in words is "one billion, two hundred twenty-nine million, six hundred sixty-seven thousand, eight hundred seventy-one".