340421129 has 2 divisors, whose sum is σ = 340421130. Its totient is φ = 340421128.

The previous prime is 340421113. The next prime is 340421143. The reversal of 340421129 is 921124043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 216766729 + 123654400 = 14723^2 + 11120^2 .

It is a cyclic number.

It is not a de Polignac number, because 340421129 - 2⁴ = 340421113 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 340421098 and 340421107.

It is not a weakly prime, because it can be changed into another prime (340421149) 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, 170210564 + 170210565.

It is an arithmetic number, because the mean of its divisors is an integer number (170210565).

Almost surely, 2^340421129 is an apocalyptic number.

It is an amenable number.

340421129 is a deficient number, since it is larger than the sum of its proper divisors (1).

340421129 is an equidigital number, since it uses as much as digits as its factorization.

340421129 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 26.

The square root of 340421129 is about 18450.5048440415. The cubic root of 340421129 is about 698.2412508320.

The spelling of 340421129 in words is "three hundred forty million, four hundred twenty-one thousand, one hundred twenty-nine".