336543821 has 2 divisors, whose sum is σ = 336543822. Its totient is φ = 336543820.

The previous prime is 336543803. The next prime is 336543833. The reversal of 336543821 is 128345633.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 320052100 + 16491721 = 17890^2 + 4061^2 .

It is a cyclic number.

It is not a de Polignac number, because 336543821 - 2¹⁴ = 336527437 is a prime.

It is a super-2 number, since 2×336543821² = 226523486906560082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (336593821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 168271910 + 168271911.

It is an arithmetic number, because the mean of its divisors is an integer number (168271911).

Almost surely, 2^336543821 is an apocalyptic number.

It is an amenable number.

336543821 is a deficient number, since it is larger than the sum of its proper divisors (1).

336543821 is an equidigital number, since it uses as much as digits as its factorization.

336543821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 35.

The square root of 336543821 is about 18345.1307163509. The cubic root of 336543821 is about 695.5801935321.

The spelling of 336543821 in words is "three hundred thirty-six million, five hundred forty-three thousand, eight hundred twenty-one".