657403 has 2 divisors, whose sum is σ = 657404. Its totient is φ = 657402.

The previous prime is 657383. The next prime is 657413. The reversal of 657403 is 304756.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 657403 - 2⁹ = 656891 is a prime.

It is not a weakly prime, because it can be changed into another prime (657413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328701 + 328702.

It is an arithmetic number, because the mean of its divisors is an integer number (328702).

2⁶⁵⁷⁴⁰³ is an apocalyptic number.

657403 is a deficient number, since it is larger than the sum of its proper divisors (1).

657403 is an equidigital number, since it uses as much as digits as its factorization.

657403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 657403 is about 810.8039220428. The cubic root of 657403 is about 86.9515297895.

The spelling of 657403 in words is "six hundred fifty-seven thousand, four hundred three".