338929021 has 2 divisors, whose sum is σ = 338929022. Its totient is φ = 338929020.

The previous prime is 338928979. The next prime is 338929043. The reversal of 338929021 is 120929833.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 310252996 + 28676025 = 17614^2 + 5355^2 .

It is a cyclic number.

It is not a de Polignac number, because 338929021 - 2¹⁵ = 338896253 is a prime.

It is a super-2 number, since 2×338929021² = 229745762552036882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (338929621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169464510 + 169464511.

It is an arithmetic number, because the mean of its divisors is an integer number (169464511).

Almost surely, 2^338929021 is an apocalyptic number.

It is an amenable number.

338929021 is a deficient number, since it is larger than the sum of its proper divisors (1).

338929021 is an equidigital number, since it uses as much as digits as its factorization.

338929021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 338929021 is about 18410.0250135626. The cubic root of 338929021 is about 697.2195973830.

The spelling of 338929021 in words is "three hundred thirty-eight million, nine hundred twenty-nine thousand, twenty-one".