340432423 has 2 divisors, whose sum is σ = 340432424. Its totient is φ = 340432422.

The previous prime is 340432373. The next prime is 340432439. The reversal of 340432423 is 324234043.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340432423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340432493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170216211 + 170216212.

It is an arithmetic number, because the mean of its divisors is an integer number (170216212).

Almost surely, 2^340432423 is an apocalyptic number.

340432423 is a deficient number, since it is larger than the sum of its proper divisors (1).

340432423 is an equidigital number, since it uses as much as digits as its factorization.

340432423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 25.

The square root of 340432423 is about 18450.8109035890. The cubic root of 340432423 is about 698.2489724928.

Adding to 340432423 its reverse (324234043), we get a palindrome (664666466).

The spelling of 340432423 in words is "three hundred forty million, four hundred thirty-two thousand, four hundred twenty-three".