405920143 has 2 divisors, whose sum is σ = 405920144. Its totient is φ = 405920142.

The previous prime is 405920117. The next prime is 405920159. The reversal of 405920143 is 341029504.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405920143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405920173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202960071 + 202960072.

It is an arithmetic number, because the mean of its divisors is an integer number (202960072).

Almost surely, 2^405920143 is an apocalyptic number.

405920143 is a deficient number, since it is larger than the sum of its proper divisors (1).

405920143 is an equidigital number, since it uses as much as digits as its factorization.

405920143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 405920143 is about 20147.4599639756. The cubic root of 405920143 is about 740.4235115293.

Adding to 405920143 its reverse (341029504), we get a palindrome (746949647).

The spelling of 405920143 in words is "four hundred five million, nine hundred twenty thousand, one hundred forty-three".