993925285 has 4 divisors (see below), whose sum is σ = 1192710348. Its totient is φ = 795140224.

The previous prime is 993925259. The next prime is 993925301. The reversal of 993925285 is 582529399.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 582529399 = 593 ⋅982343.

It can be written as a sum of positive squares in 2 ways, for example, as 610979524 + 382945761 = 24718^2 + 19569^2 .

It is a cyclic number.

It is not a de Polignac number, because 993925285 - 2⁵ = 993925253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99392524 + ... + 99392533.

It is an arithmetic number, because the mean of its divisors is an integer number (298177587).

Almost surely, 2^993925285 is an apocalyptic number.

It is an amenable number.

993925285 is a deficient number, since it is larger than the sum of its proper divisors (198785063).

993925285 is a wasteful number, since it uses less digits than its factorization.

993925285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198785062.

The product of its digits is 1749600, while the sum is 52.

The square root of 993925285 is about 31526.5806106530. The cubic root of 993925285 is about 997.9709808658.

The spelling of 993925285 in words is "nine hundred ninety-three million, nine hundred twenty-five thousand, two hundred eighty-five".