122709869 has 2 divisors, whose sum is σ = 122709870. Its totient is φ = 122709868.

The previous prime is 122709841. The next prime is 122709901. The reversal of 122709869 is 968907221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69973225 + 52736644 = 8365^2 + 7262^2 .

It is an emirp because it is prime and its reverse (968907221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122709869 is a prime.

It is a super-2 number, since 2×122709869² = 30115423899994322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen 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 (122703869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61354934 + 61354935.

It is an arithmetic number, because the mean of its divisors is an integer number (61354935).

Almost surely, 2^122709869 is an apocalyptic number.

It is an amenable number.

122709869 is a deficient number, since it is larger than the sum of its proper divisors (1).

122709869 is an equidigital number, since it uses as much as digits as its factorization.

122709869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 122709869 is about 11077.4486683532. The cubic root of 122709869 is about 496.9276520237.

The spelling of 122709869 in words is "one hundred twenty-two million, seven hundred nine thousand, eight hundred sixty-nine".