338116921 has 2 divisors, whose sum is σ = 338116922. Its totient is φ = 338116920.

The previous prime is 338116901. The next prime is 338116937. The reversal of 338116921 is 129611833.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 291043600 + 47073321 = 17060^2 + 6861^2 .

It is a cyclic number.

It is not a de Polignac number, because 338116921 - 2⁹ = 338116409 is a prime.

It is a super-2 number, since 2×338116921² = 228646104533040482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (338116901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169058460 + 169058461.

It is an arithmetic number, because the mean of its divisors is an integer number (169058461).

Almost surely, 2^338116921 is an apocalyptic number.

It is an amenable number.

338116921 is a deficient number, since it is larger than the sum of its proper divisors (1).

338116921 is an equidigital number, since it uses as much as digits as its factorization.

338116921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 34.

The square root of 338116921 is about 18387.9558679044. The cubic root of 338116921 is about 696.6622881018.

It can be divided in two parts, 3381 and 16921, that added together give a palindrome (20302).

The spelling of 338116921 in words is "three hundred thirty-eight million, one hundred sixteen thousand, nine hundred twenty-one".