618163121 has 2 divisors, whose sum is σ = 618163122. Its totient is φ = 618163120.

The previous prime is 618163099. The next prime is 618163151. The reversal of 618163121 is 121361816.

618163121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 377758096 + 240405025 = 19436^2 + 15505^2 .

It is a cyclic number.

It is not a de Polignac number, because 618163121 - 2⁶ = 618163057 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (618163151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309081560 + 309081561.

It is an arithmetic number, because the mean of its divisors is an integer number (309081561).

Almost surely, 2^618163121 is an apocalyptic number.

It is an amenable number.

618163121 is a deficient number, since it is larger than the sum of its proper divisors (1).

618163121 is an equidigital number, since it uses as much as digits as its factorization.

618163121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 29.

The square root of 618163121 is about 24862.8864173088. The cubic root of 618163121 is about 851.8589630586.

The spelling of 618163121 in words is "six hundred eighteen million, one hundred sixty-three thousand, one hundred twenty-one".