657134243 has 2 divisors, whose sum is σ = 657134244. Its totient is φ = 657134242.

The previous prime is 657134237. The next prime is 657134251. The reversal of 657134243 is 342431756.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 657134243 - 2⁸ = 657133987 is a prime.

It is equal to p_34144928 and since 657134243 and 34144928 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (657134263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328567121 + 328567122.

It is an arithmetic number, because the mean of its divisors is an integer number (328567122).

Almost surely, 2^657134243 is an apocalyptic number.

657134243 is a deficient number, since it is larger than the sum of its proper divisors (1).

657134243 is an equidigital number, since it uses as much as digits as its factorization.

657134243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 35.

The square root of 657134243 is about 25634.6297613209. The cubic root of 657134243 is about 869.3967910963.

Adding to 657134243 its reverse (342431756), we get a palindrome (999565999).

The spelling of 657134243 in words is "six hundred fifty-seven million, one hundred thirty-four thousand, two hundred forty-three".