121167789 has 16 divisors (see below), whose sum is σ = 171320832. Its totient is φ = 75911168.

The previous prime is 121167757. The next prime is 121167817. The reversal of 121167789 is 987761121.

It is a cyclic number.

It is not a de Polignac number, because 121167789 - 2⁵ = 121167757 is a prime.

It is a super-2 number, since 2×121167789² = 29363266182297042, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121167789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121167089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42637 + ... + 45389.

It is an arithmetic number, because the mean of its divisors is an integer number (10707552).

Almost surely, 2^121167789 is an apocalyptic number.

It is an amenable number.

121167789 is a deficient number, since it is larger than the sum of its proper divisors (50153043).

121167789 is a wasteful number, since it uses less digits than its factorization.

121167789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3636.

The product of its digits is 42336, while the sum is 42.

The square root of 121167789 is about 11007.6241305742. The cubic root of 121167789 is about 494.8372610626.

It can be divided in two parts, 121 and 167789, that added together give a triangular number (167910 = T₅₇₉).

The spelling of 121167789 in words is "one hundred twenty-one million, one hundred sixty-seven thousand, seven hundred eighty-nine".