605657 has 4 divisors (see below), whose sum is σ = 652260. Its totient is φ = 559056.

The previous prime is 605641. The next prime is 605687. The reversal of 605657 is 756506.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 756506 = 2 ⋅378253.

It can be written as a sum of positive squares in 2 ways, for example, as 59536 + 546121 = 244^2 + 739^2 .

It is a cyclic number.

It is not a de Polignac number, because 605657 - 2⁴ = 605641 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 605657.

It is not an unprimeable number, because it can be changed into a prime (605617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23282 + ... + 23307.

It is an arithmetic number, because the mean of its divisors is an integer number (163065).

2⁶⁰⁵⁶⁵⁷ is an apocalyptic number.

It is an amenable number.

605657 is a deficient number, since it is larger than the sum of its proper divisors (46603).

605657 is a wasteful number, since it uses less digits than its factorization.

605657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46602.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 605657 is about 778.2396803042. The cubic root of 605657 is about 84.6075099474.

The spelling of 605657 in words is "six hundred five thousand, six hundred fifty-seven".