335620981 has 2 divisors, whose sum is σ = 335620982. Its totient is φ = 335620980.

The previous prime is 335620951. The next prime is 335621003. The reversal of 335620981 is 189026533.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228312100 + 107308881 = 15110^2 + 10359^2 .

It is an emirp because it is prime and its reverse (189026533) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 335620981 - 2⁵ = 335620949 is a prime.

It is a super-2 number, since 2×335620981² = 225282885774804722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 335620981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (335620951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167810490 + 167810491.

It is an arithmetic number, because the mean of its divisors is an integer number (167810491).

Almost surely, 2^335620981 is an apocalyptic number.

It is an amenable number.

335620981 is a deficient number, since it is larger than the sum of its proper divisors (1).

335620981 is an equidigital number, since it uses as much as digits as its factorization.

335620981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 335620981 is about 18319.9612717931. The cubic root of 335620981 is about 694.9438258343.

The spelling of 335620981 in words is "three hundred thirty-five million, six hundred twenty thousand, nine hundred eighty-one".