69139229 has 2 divisors, whose sum is σ = 69139230. Its totient is φ = 69139228.

The previous prime is 69139223. The next prime is 69139237. The reversal of 69139229 is 92293196.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69139225 + 4 = 8315^2 + 2^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69139229 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69139223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34569614 + 34569615.

It is an arithmetic number, because the mean of its divisors is an integer number (34569615).

Almost surely, 2^69139229 is an apocalyptic number.

It is an amenable number.

69139229 is a deficient number, since it is larger than the sum of its proper divisors (1).

69139229 is an equidigital number, since it uses as much as digits as its factorization.

69139229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52488, while the sum is 41.

The square root of 69139229 is about 8315.0002405292. Note that the first 3 decimals coincide. The cubic root of 69139229 is about 410.4322805344.

The spelling of 69139229 in words is "sixty-nine million, one hundred thirty-nine thousand, two hundred twenty-nine".