1243200029 has 2 divisors, whose sum is σ = 1243200030. Its totient is φ = 1243200028.

The previous prime is 1243200019. The next prime is 1243200031. The reversal of 1243200029 is 9200023421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1023360100 + 219839929 = 31990^2 + 14827^2 .

It is a cyclic number.

It is not a de Polignac number, because 1243200029 - 2²⁸ = 974764573 is a prime.

Together with 1243200031, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1243199977 and 1243200013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1243200019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621600014 + 621600015.

It is an arithmetic number, because the mean of its divisors is an integer number (621600015).

Almost surely, 2^1243200029 is an apocalyptic number.

It is an amenable number.

1243200029 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243200029 is an equidigital number, since it uses as much as digits as its factorization.

1243200029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1243200029 is about 35259.0418049045. The cubic root of 1243200029 is about 1075.2604464317.

The spelling of 1243200029 in words is "one billion, two hundred forty-three million, two hundred thousand, twenty-nine".