69009221 has 2 divisors, whose sum is σ = 69009222. Its totient is φ = 69009220.

The previous prime is 69009209. The next prime is 69009251. The reversal of 69009221 is 12290096.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48804196 + 20205025 = 6986^2 + 4495^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69009221 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69009251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34504610 + 34504611.

It is an arithmetic number, because the mean of its divisors is an integer number (34504611).

Almost surely, 2^69009221 is an apocalyptic number.

It is an amenable number.

69009221 is a deficient number, since it is larger than the sum of its proper divisors (1).

69009221 is an equidigital number, since it uses as much as digits as its factorization.

69009221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 69009221 is about 8307.1788833514. The cubic root of 69009221 is about 410.1748629484.

The spelling of 69009221 in words is "sixty-nine million, nine thousand, two hundred twenty-one".