68550121 has 2 divisors, whose sum is σ = 68550122. Its totient is φ = 68550120.

The previous prime is 68550059. The next prime is 68550151. The reversal of 68550121 is 12105586.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39000025 + 29550096 = 6245^2 + 5436^2 .

It is a cyclic number.

It is not a de Polignac number, because 68550121 - 2¹³ = 68541929 is a prime.

It is a super-2 number, since 2×68550121² = 9398238178229282, which contains 22 as substring.

It is a Chen prime.

It is the 8280-th Hogben number.

It is a self number, because there is not a number n which added to its sum of digits gives 68550121.

It is not a weakly prime, because it can be changed into another prime (68550151) by changing a digit.

It is a nontrivial repunit in base 8279.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34275060 + 34275061.

It is an arithmetic number, because the mean of its divisors is an integer number (34275061).

Almost surely, 2^68550121 is an apocalyptic number.

It is an amenable number.

68550121 is a deficient number, since it is larger than the sum of its proper divisors (1).

68550121 is an equidigital number, since it uses as much as digits as its factorization.

68550121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 68550121 is about 8279.5000452926. The cubic root of 68550121 is about 409.2632435923.

The spelling of 68550121 in words is "sixty-eight million, five hundred fifty thousand, one hundred twenty-one".