121906769 has 2 divisors, whose sum is σ = 121906770. Its totient is φ = 121906768.

The previous prime is 121906721. The next prime is 121906777. The reversal of 121906769 is 967609121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120670225 + 1236544 = 10985^2 + 1112^2 .

It is an emirp because it is prime and its reverse (967609121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121906769 - 2⁸ = 121906513 is a prime.

It is a super-2 number, since 2×121906769² = 29722520656038722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121986769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60953384 + 60953385.

It is an arithmetic number, because the mean of its divisors is an integer number (60953385).

Almost surely, 2^121906769 is an apocalyptic number.

It is an amenable number.

121906769 is a deficient number, since it is larger than the sum of its proper divisors (1).

121906769 is an equidigital number, since it uses as much as digits as its factorization.

121906769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 121906769 is about 11041.1398415200. The cubic root of 121906769 is about 495.8411966144.

The spelling of 121906769 in words is "one hundred twenty-one million, nine hundred six thousand, seven hundred sixty-nine".