3717138121 has 2 divisors, whose sum is σ = 3717138122. Its totient is φ = 3717138120.

The previous prime is 3717138109. The next prime is 3717138137. The reversal of 3717138121 is 1218317173.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2055352896 + 1661785225 = 45336^2 + 40765^2 .

It is a cyclic number.

It is not a de Polignac number, because 3717138121 - 2⁹ = 3717137609 is a prime.

It is not a weakly prime, because it can be changed into another prime (3717138101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1858569060 + 1858569061.

It is an arithmetic number, because the mean of its divisors is an integer number (1858569061).

Almost surely, 2^3717138121 is an apocalyptic number.

It is an amenable number.

3717138121 is a deficient number, since it is larger than the sum of its proper divisors (1).

3717138121 is an equidigital number, since it uses as much as digits as its factorization.

3717138121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 34.

The square root of 3717138121 is about 60968.3370365307. The cubic root of 3717138121 is about 1549.0647317848.

The spelling of 3717138121 in words is "three billion, seven hundred seventeen million, one hundred thirty-eight thousand, one hundred twenty-one".