340063421 has 2 divisors, whose sum is σ = 340063422. Its totient is φ = 340063420.

The previous prime is 340063379. The next prime is 340063429. The reversal of 340063421 is 124360043.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 269419396 + 70644025 = 16414^2 + 8405^2 .

It is an emirp because it is prime and its reverse (124360043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340063421 - 2¹⁸ = 339801277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340063429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170031710 + 170031711.

It is an arithmetic number, because the mean of its divisors is an integer number (170031711).

Almost surely, 2^340063421 is an apocalyptic number.

It is an amenable number.

340063421 is a deficient number, since it is larger than the sum of its proper divisors (1).

340063421 is an equidigital number, since it uses as much as digits as its factorization.

340063421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 340063421 is about 18440.8085777170. The cubic root of 340063421 is about 697.9965989440.

The spelling of 340063421 in words is "three hundred forty million, sixty-three thousand, four hundred twenty-one".