998910297025 has 27 divisors (see below), whose sum is σ = 1265861365321. Its totient is φ = 781941609440.

The previous prime is 998910297019. The next prime is 998910297083. The reversal of 998910297025 is 520792019899.

The square root of 998910297025 is 999455.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 318997910401 + 679912386624 = 564799^2 + 824568^2 .

It is not a de Polignac number, because 998910297025 - 2⁷ = 998910296897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 234869799 + ... + 234874051.

Almost surely, 2^998910297025 is an apocalyptic number.

998910297025 is the 999455-th square number.

998910297025 is the 499728-th centered octagonal number.

It is an amenable number.

998910297025 is a deficient number, since it is larger than the sum of its proper divisors (266951068296).

998910297025 is an frugal number, since it uses more digits than its factorization.

998910297025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8610 (or 4305 counting only the distinct ones).

The product of its (nonzero) digits is 7348320, while the sum is 61.

The spelling of 998910297025 in words is "nine hundred ninety-eight billion, nine hundred ten million, two hundred ninety-seven thousand, twenty-five".