121945769 has 4 divisors (see below), whose sum is σ = 133031760. Its totient is φ = 110859780.

The previous prime is 121945751. The next prime is 121945787. The reversal of 121945769 is 967549121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (121945751) and next prime (121945787).

It is a cyclic number.

It is not a de Polignac number, because 121945769 - 2⁸ = 121945513 is a prime.

It is a super-2 number, since 2×121945769² = 29741541154002722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121945799) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5542979 + ... + 5543000.

It is an arithmetic number, because the mean of its divisors is an integer number (33257940).

Almost surely, 2^121945769 is an apocalyptic number.

It is an amenable number.

121945769 is a deficient number, since it is larger than the sum of its proper divisors (11085991).

121945769 is a wasteful number, since it uses less digits than its factorization.

121945769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11085990.

The product of its digits is 136080, while the sum is 44.

The square root of 121945769 is about 11042.9058222915. The cubic root of 121945769 is about 495.8940669213.

The spelling of 121945769 in words is "one hundred twenty-one million, nine hundred forty-five thousand, seven hundred sixty-nine".