121658163 has 16 divisors (see below), whose sum is σ = 179093376. Its totient is φ = 72842240.

The previous prime is 121658143. The next prime is 121658179. The reversal of 121658163 is 361856121.

It is a cyclic number.

It is not a de Polignac number, because 121658163 - 2¹⁰ = 121657139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (121658143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19470 + ... + 24947.

It is an arithmetic number, because the mean of its divisors is an integer number (11193336).

Almost surely, 2^121658163 is an apocalyptic number.

121658163 is a deficient number, since it is larger than the sum of its proper divisors (57435213).

121658163 is a wasteful number, since it uses less digits than its factorization.

121658163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44514.

The product of its digits is 8640, while the sum is 33.

The square root of 121658163 is about 11029.8759285860. The cubic root of 121658163 is about 495.5039088457.

The spelling of 121658163 in words is "one hundred twenty-one million, six hundred fifty-eight thousand, one hundred sixty-three".