121529669 has 2 divisors, whose sum is σ = 121529670. Its totient is φ = 121529668.

The previous prime is 121529663. The next prime is 121529701. The reversal of 121529669 is 966925121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115304644 + 6225025 = 10738^2 + 2495^2 .

It is an emirp because it is prime and its reverse (966925121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121529669 is a prime.

It is a super-2 number, since 2×121529669² = 29538920894499122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121529663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60764834 + 60764835.

It is an arithmetic number, because the mean of its divisors is an integer number (60764835).

Almost surely, 2^121529669 is an apocalyptic number.

It is an amenable number.

121529669 is a deficient number, since it is larger than the sum of its proper divisors (1).

121529669 is an equidigital number, since it uses as much as digits as its factorization.

121529669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 41.

The square root of 121529669 is about 11024.0495735460. The cubic root of 121529669 is about 495.3293988184.

The spelling of 121529669 in words is "one hundred twenty-one million, five hundred twenty-nine thousand, six hundred sixty-nine".