657140443 has 2 divisors, whose sum is σ = 657140444. Its totient is φ = 657140442.

The previous prime is 657140401. The next prime is 657140447. The reversal of 657140443 is 344041756.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 657140443 - 2¹³ = 657132251 is a prime.

It is a super-3 number, since 3×657140443³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 657140399 and 657140408.

It is not a weakly prime, because it can be changed into another prime (657140447) 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, 328570221 + 328570222.

It is an arithmetic number, because the mean of its divisors is an integer number (328570222).

Almost surely, 2^657140443 is an apocalyptic number.

657140443 is a deficient number, since it is larger than the sum of its proper divisors (1).

657140443 is an equidigital number, since it uses as much as digits as its factorization.

657140443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 657140443 is about 25634.7506912004. The cubic root of 657140443 is about 869.3995253134.

The spelling of 657140443 in words is "six hundred fifty-seven million, one hundred forty thousand, four hundred forty-three".