69840229 has 2 divisors, whose sum is σ = 69840230. Its totient is φ = 69840228.

The previous prime is 69840227. The next prime is 69840263. The reversal of 69840229 is 92204896.

69840229 = T₆₈₂₂ + T₆₈₂₃ + T₆₈₂₄.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68145025 + 1695204 = 8255^2 + 1302^2 .

It is a cyclic number.

It is not a de Polignac number, because 69840229 - 2¹ = 69840227 is a prime.

Together with 69840227, 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 = 69840191 and 69840200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69840227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34920114 + 34920115.

It is an arithmetic number, because the mean of its divisors is an integer number (34920115).

Almost surely, 2^69840229 is an apocalyptic number.

69840229 is the 6824-th centered triangular number.

It is an amenable number.

69840229 is a deficient number, since it is larger than the sum of its proper divisors (1).

69840229 is an equidigital number, since it uses as much as digits as its factorization.

69840229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 69840229 is about 8357.0466673341. The cubic root of 69840229 is about 411.8147378489.

The spelling of 69840229 in words is "sixty-nine million, eight hundred forty thousand, two hundred twenty-nine".