334020721 has 2 divisors, whose sum is σ = 334020722. Its totient is φ = 334020720.

The previous prime is 334020683. The next prime is 334020733. The reversal of 334020721 is 127020433.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228342321 + 105678400 = 15111^2 + 10280^2 .

It is a cyclic number.

It is not a de Polignac number, because 334020721 - 2²¹ = 331923569 is a prime.

It is a super-2 number, since 2×334020721² = 223139684114719682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 334020692 and 334020701.

It is not a weakly prime, because it can be changed into another prime (334020751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167010360 + 167010361.

It is an arithmetic number, because the mean of its divisors is an integer number (167010361).

Almost surely, 2^334020721 is an apocalyptic number.

It is an amenable number.

334020721 is a deficient number, since it is larger than the sum of its proper divisors (1).

334020721 is an equidigital number, since it uses as much as digits as its factorization.

334020721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 334020721 is about 18276.2337750424. The cubic root of 334020721 is about 693.8375550995.

The spelling of 334020721 in words is "three hundred thirty-four million, twenty thousand, seven hundred twenty-one".