334420921 has 2 divisors, whose sum is σ = 334420922. Its totient is φ = 334420920.

The previous prime is 334420913. The next prime is 334420927. The reversal of 334420921 is 129024433.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195440400 + 138980521 = 13980^2 + 11789^2 .

It is an emirp because it is prime and its reverse (129024433) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 334420921 - 2³ = 334420913 is a prime.

It is a super-2 number, since 2×334420921² = 223674704804976482, 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 334420921.

It is not a weakly prime, because it can be changed into another prime (334420927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167210460 + 167210461.

It is an arithmetic number, because the mean of its divisors is an integer number (167210461).

Almost surely, 2^334420921 is an apocalyptic number.

It is an amenable number.

334420921 is a deficient number, since it is larger than the sum of its proper divisors (1).

334420921 is an equidigital number, since it uses as much as digits as its factorization.

334420921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 334420921 is about 18287.1791427765. The cubic root of 334420921 is about 694.1145468643.

The spelling of 334420921 in words is "three hundred thirty-four million, four hundred twenty thousand, nine hundred twenty-one".