339694021 has 2 divisors, whose sum is σ = 339694022. Its totient is φ = 339694020.

The previous prime is 339694009. The next prime is 339694067. The reversal of 339694021 is 120496933.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 252364996 + 87329025 = 15886^2 + 9345^2 .

It is an emirp because it is prime and its reverse (120496933) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 339694021 - 2¹¹ = 339691973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (339694321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169847010 + 169847011.

It is an arithmetic number, because the mean of its divisors is an integer number (169847011).

Almost surely, 2^339694021 is an apocalyptic number.

It is an amenable number.

339694021 is a deficient number, since it is larger than the sum of its proper divisors (1).

339694021 is an equidigital number, since it uses as much as digits as its factorization.

339694021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 339694021 is about 18430.7900264747. The cubic root of 339694021 is about 697.7437702605.

It can be divided in two parts, 33969402 and 1, that added together give a triangular number (33969403 = T₈₂₄₂).

The spelling of 339694021 in words is "three hundred thirty-nine million, six hundred ninety-four thousand, twenty-one".