4688718121 has 4 divisors (see below), whose sum is σ = 4694041044. Its totient is φ = 4683395200.

The previous prime is 4688718113. The next prime is 4688718137. The reversal of 4688718121 is 1218178864.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2985092496 + 1703625625 = 54636^2 + 41275^2 .

It is a cyclic number.

It is not a de Polignac number, because 4688718121 - 2³ = 4688718113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4688718161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2660140 + ... + 2661901.

It is an arithmetic number, because the mean of its divisors is an integer number (1173510261).

Almost surely, 2^4688718121 is an apocalyptic number.

It is an amenable number.

4688718121 is a deficient number, since it is larger than the sum of its proper divisors (5322923).

4688718121 is an equidigital number, since it uses as much as digits as its factorization.

4688718121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5322922.

The product of its digits is 172032, while the sum is 46.

The square root of 4688718121 is about 68474.2150082788. The cubic root of 4688718121 is about 1673.7273315981.

The spelling of 4688718121 in words is "four billion, six hundred eighty-eight million, seven hundred eighteen thousand, one hundred twenty-one".