998057 has 4 divisors (see below), whose sum is σ = 1001616. Its totient is φ = 994500.

The previous prime is 998029. The next prime is 998069. The reversal of 998057 is 750899.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 750899 = 19 ⋅39521.

It is a cyclic number.

It is not a de Polignac number, because 998057 - 2¹² = 993961 is a prime.

It is a super-2 number, since 2×998057² = 1992235550498, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 998057.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 998057.

It is not an unprimeable number, because it can be changed into a prime (998017) 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, 1319 + ... + 1932.

It is an arithmetic number, because the mean of its divisors is an integer number (250404).

2⁹⁹⁸⁰⁵⁷ is an apocalyptic number.

It is an amenable number.

998057 is a deficient number, since it is larger than the sum of its proper divisors (3559).

998057 is a wasteful number, since it uses less digits than its factorization.

998057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3558.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 998057 is about 999.0280276349. The cubic root of 998057 is about 99.9351913408.

The spelling of 998057 in words is "nine hundred ninety-eight thousand, fifty-seven".