1229825879 has 2 divisors, whose sum is σ = 1229825880. Its totient is φ = 1229825878.

The previous prime is 1229825837. The next prime is 1229825897. The reversal of 1229825879 is 9785289221.

Together with next prime (1229825897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1229825879 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1229825879.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1229825899) 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, 614912939 + 614912940.

It is an arithmetic number, because the mean of its divisors is an integer number (614912940).

Almost surely, 2^1229825879 is an apocalyptic number.

1229825879 is a deficient number, since it is larger than the sum of its proper divisors (1).

1229825879 is an equidigital number, since it uses as much as digits as its factorization.

1229825879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1451520, while the sum is 53.

The square root of 1229825879 is about 35068.8733637110. The cubic root of 1229825879 is about 1071.3907089240.

The spelling of 1229825879 in words is "one billion, two hundred twenty-nine million, eight hundred twenty-five thousand, eight hundred seventy-nine".