557698 has 4 divisors (see below), whose sum is σ = 836550. Its totient is φ = 278848.

The previous prime is 557693. The next prime is 557717. The reversal of 557698 is 896755.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 896755 = 5 ⋅179351.

It can be written as a sum of positive squares in only one way, i.e., 522729 + 34969 = 723^2 + 187^2 .

It is a super-2 number, since 2×557698² = 622054118408, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 557698.

It is not an unprimeable number, because it can be changed into a prime (557693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139423 + ... + 139426.

2⁵⁵⁷⁶⁹⁸ is an apocalyptic number.

557698 is a deficient number, since it is larger than the sum of its proper divisors (278852).

557698 is a wasteful number, since it uses less digits than its factorization.

557698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278851.

The product of its digits is 75600, while the sum is 40.

The square root of 557698 is about 746.7918049899. The cubic root of 557698 is about 82.3126080408.

The spelling of 557698 in words is "five hundred fifty-seven thousand, six hundred ninety-eight".