657142043 has 2 divisors, whose sum is σ = 657142044. Its totient is φ = 657142042.

The previous prime is 657142019. The next prime is 657142051. The reversal of 657142043 is 340241756.

657142043 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 657142043 - 2⁸ = 657141787 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (657142063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328571021 + 328571022.

It is an arithmetic number, because the mean of its divisors is an integer number (328571022).

Almost surely, 2^657142043 is an apocalyptic number.

657142043 is a deficient number, since it is larger than the sum of its proper divisors (1).

657142043 is an equidigital number, since it uses as much as digits as its factorization.

657142043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 657142043 is about 25634.7818988186. The cubic root of 657142043 is about 869.4002309151.

Adding to 657142043 its reverse (340241756), we get a palindrome (997383799).

The spelling of 657142043 in words is "six hundred fifty-seven million, one hundred forty-two thousand, forty-three".