28347709829429 has 2 divisors, whose sum is σ = 28347709829430. Its totient is φ = 28347709829428.

The previous prime is 28347709829323. The next prime is 28347709829449. The reversal of 28347709829429 is 92492890774382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27025961822500 + 1321748006929 = 5198650^2 + 1149673^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28347709829429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28347709829449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14173854914714 + 14173854914715.

It is an arithmetic number, because the mean of its divisors is an integer number (14173854914715).

Almost surely, 2^{28347709829429} is an apocalyptic number.

It is an amenable number.

28347709829429 is a deficient number, since it is larger than the sum of its proper divisors (1).

28347709829429 is an equidigital number, since it uses as much as digits as its factorization.

28347709829429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 877879296, while the sum is 74.

The spelling of 28347709829429 in words is "twenty-eight trillion, three hundred forty-seven billion, seven hundred nine million, eight hundred twenty-nine thousand, four hundred twenty-nine".