340021303 has 2 divisors, whose sum is σ = 340021304. Its totient is φ = 340021302.

The previous prime is 340021273. The next prime is 340021333. The reversal of 340021303 is 303120043.

It is a balanced prime because it is at equal distance from previous prime (340021273) and next prime (340021333).

It is a cyclic number.

It is not a de Polignac number, because 340021303 - 2⁵ = 340021271 is a prime.

It is a super-2 number, since 2×340021303² = 231228972987635618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340021333) 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, 170010651 + 170010652.

It is an arithmetic number, because the mean of its divisors is an integer number (170010652).

Almost surely, 2^340021303 is an apocalyptic number.

340021303 is a deficient number, since it is larger than the sum of its proper divisors (1).

340021303 is an equidigital number, since it uses as much as digits as its factorization.

340021303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 340021303 is about 18439.6665642305. Note that the first 3 decimals coincide. The cubic root of 340021303 is about 697.9677813444.

Adding to 340021303 its reverse (303120043), we get a palindrome (643141346).

The spelling of 340021303 in words is "three hundred forty million, twenty-one thousand, three hundred three".