340638143 has 2 divisors, whose sum is σ = 340638144. Its totient is φ = 340638142.

The previous prime is 340638113. The next prime is 340638157. The reversal of 340638143 is 341836043.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 340638143 - 2⁶ = 340638079 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340638113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170319071 + 170319072.

It is an arithmetic number, because the mean of its divisors is an integer number (170319072).

Almost surely, 2^340638143 is an apocalyptic number.

340638143 is a deficient number, since it is larger than the sum of its proper divisors (1).

340638143 is an equidigital number, since it uses as much as digits as its factorization.

340638143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 340638143 is about 18456.3848843700. The cubic root of 340638143 is about 698.3895925243.

The spelling of 340638143 in words is "three hundred forty million, six hundred thirty-eight thousand, one hundred forty-three".