4147692121 has 2 divisors, whose sum is σ = 4147692122. Its totient is φ = 4147692120.

The previous prime is 4147692103. The next prime is 4147692139. The reversal of 4147692121 is 1212967414.

4147692121 = 45539² + 45540².

It is a balanced prime because it is at equal distance from previous prime (4147692103) and next prime (4147692139).

It can be written as a sum of positive squares in only one way, i.e., 2073891600 + 2073800521 = 45540^2 + 45539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4147692121 is a prime.

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

It is not a weakly prime, because it can be changed into another prime (4147699121) 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, 2073846060 + 2073846061.

It is an arithmetic number, because the mean of its divisors is an integer number (2073846061).

Almost surely, 2^4147692121 is an apocalyptic number.

4147692121 is the 45540-th centered square number.

It is an amenable number.

4147692121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4147692121 is an equidigital number, since it uses as much as digits as its factorization.

4147692121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 37.

The square root of 4147692121 is about 64402.5785275714. The cubic root of 4147692121 is about 1606.7026274547.

The spelling of 4147692121 in words is "four billion, one hundred forty-seven million, six hundred ninety-two thousand, one hundred twenty-one".