121889669 has 8 divisors (see below), whose sum is σ = 133267008. Its totient is φ = 110561760.

The previous prime is 121889629. The next prime is 121889671. The reversal of 121889669 is 966988121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121889669 - 2¹² = 121885573 is a prime.

It is a super-2 number, since 2×121889669² = 29714182817859122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121889629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7097 + ... + 17150.

It is an arithmetic number, because the mean of its divisors is an integer number (16658376).

Almost surely, 2^121889669 is an apocalyptic number.

It is an amenable number.

121889669 is a deficient number, since it is larger than the sum of its proper divisors (11377339).

121889669 is a wasteful number, since it uses less digits than its factorization.

121889669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24715.

The product of its digits is 373248, while the sum is 50.

The square root of 121889669 is about 11040.3654377924. The cubic root of 121889669 is about 495.8180114623.

The spelling of 121889669 in words is "one hundred twenty-one million, eight hundred eighty-nine thousand, six hundred sixty-nine".