4238314921 has 2 divisors, whose sum is σ = 4238314922. Its totient is φ = 4238314920.

The previous prime is 4238314901. The next prime is 4238314991. The reversal of 4238314921 is 1294138324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2368184896 + 1870130025 = 48664^2 + 43245^2 .

It is a cyclic number.

It is not a de Polignac number, because 4238314921 - 2⁵ = 4238314889 is a prime.

It is not a weakly prime, because it can be changed into another prime (4238314901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2119157460 + 2119157461.

It is an arithmetic number, because the mean of its divisors is an integer number (2119157461).

Almost surely, 2^4238314921 is an apocalyptic number.

It is an amenable number.

4238314921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4238314921 is an equidigital number, since it uses as much as digits as its factorization.

4238314921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 37.

The square root of 4238314921 is about 65102.3419010407. The cubic root of 4238314921 is about 1618.3200235307.

The spelling of 4238314921 in words is "four billion, two hundred thirty-eight million, three hundred fourteen thousand, nine hundred twenty-one".