340420351 has 2 divisors, whose sum is σ = 340420352. Its totient is φ = 340420350.

The previous prime is 340420303. The next prime is 340420361. The reversal of 340420351 is 153024043.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 340420351 - 2¹³ = 340412159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340420361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170210175 + 170210176.

It is an arithmetic number, because the mean of its divisors is an integer number (170210176).

Almost surely, 2^340420351 is an apocalyptic number.

340420351 is a deficient number, since it is larger than the sum of its proper divisors (1).

340420351 is an equidigital number, since it uses as much as digits as its factorization.

340420351 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 340420351 is about 18450.4837605955. The cubic root of 340420351 is about 698.2407189103.

Adding to 340420351 its reverse (153024043), we get a palindrome (493444394).

The spelling of 340420351 in words is "three hundred forty million, four hundred twenty thousand, three hundred fifty-one".