121649069 has 2 divisors, whose sum is σ = 121649070. Its totient is φ = 121649068.

The previous prime is 121649029. The next prime is 121649111. The reversal of 121649069 is 960946121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117397225 + 4251844 = 10835^2 + 2062^2 .

It is an emirp because it is prime and its reverse (960946121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121649069 is a prime.

It is a super-2 number, since 2×121649069² = 29596991977133522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121649029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60824534 + 60824535.

It is an arithmetic number, because the mean of its divisors is an integer number (60824535).

Almost surely, 2^121649069 is an apocalyptic number.

It is an amenable number.

121649069 is a deficient number, since it is larger than the sum of its proper divisors (1).

121649069 is an equidigital number, since it uses as much as digits as its factorization.

121649069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 121649069 is about 11029.4636768974. The cubic root of 121649069 is about 495.4915621613.

The spelling of 121649069 in words is "one hundred twenty-one million, six hundred forty-nine thousand, sixty-nine".