1229667839 has 2 divisors, whose sum is σ = 1229667840. Its totient is φ = 1229667838.

The previous prime is 1229667799. The next prime is 1229667871. The reversal of 1229667839 is 9387669221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1229667839 - 2²⁸ = 961232383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1229667899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614833919 + 614833920.

It is an arithmetic number, because the mean of its divisors is an integer number (614833920).

Almost surely, 2^1229667839 is an apocalyptic number.

1229667839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1229667839 is an equidigital number, since it uses as much as digits as its factorization.

1229667839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 53.

The square root of 1229667839 is about 35066.6200110590. The cubic root of 1229667839 is about 1071.3448135812.

The spelling of 1229667839 in words is "one billion, two hundred twenty-nine million, six hundred sixty-seven thousand, eight hundred thirty-nine".