335390021 has 2 divisors, whose sum is σ = 335390022. Its totient is φ = 335390020.

The previous prime is 335390009. The next prime is 335390051. The reversal of 335390021 is 120093533.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 334487521 + 902500 = 18289^2 + 950^2 .

It is a cyclic number.

It is not a de Polignac number, because 335390021 - 2¹⁰ = 335388997 is a prime.

It is a super-2 number, since 2×335390021² = 224972932372760882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (335390051) 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, 167695010 + 167695011.

It is an arithmetic number, because the mean of its divisors is an integer number (167695011).

Almost surely, 2^335390021 is an apocalyptic number.

It is an amenable number.

335390021 is a deficient number, since it is larger than the sum of its proper divisors (1).

335390021 is an equidigital number, since it uses as much as digits as its factorization.

335390021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430, while the sum is 26.

The square root of 335390021 is about 18313.6566801936. The cubic root of 335390021 is about 694.7843790510.

The spelling of 335390021 in words is "three hundred thirty-five million, three hundred ninety thousand, twenty-one".