340133021 has 2 divisors, whose sum is σ = 340133022. Its totient is φ = 340133020.

The previous prime is 340132997. The next prime is 340133077. The reversal of 340133021 is 120331043.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 338044996 + 2088025 = 18386^2 + 1445^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340133021 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340133221) 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, 170066510 + 170066511.

It is an arithmetic number, because the mean of its divisors is an integer number (170066511).

Almost surely, 2^340133021 is an apocalyptic number.

It is an amenable number.

340133021 is a deficient number, since it is larger than the sum of its proper divisors (1).

340133021 is an equidigital number, since it uses as much as digits as its factorization.

340133021 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 17.

The square root of 340133021 is about 18442.6956001556. The cubic root of 340133021 is about 698.0442148164.

Adding to 340133021 its reverse (120331043), we get a palindrome (460464064).

The spelling of 340133021 in words is "three hundred forty million, one hundred thirty-three thousand, twenty-one".