999357925 has 6 divisors (see below), whose sum is σ = 1239203858.
Its totient is φ = 799486320.
The previous prime is 999357917. The next prime is 999357959. The reversal of 999357925 is 529753999.
999357925 = 223532 + 223542.
999357925 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.
It can be written as a sum of positive squares in 3 ways, for example, as 231070401 + 768287524 = 15201^2 + 27718^2
It is not a de Polignac number, because 999357925 - 23 = 999357917 is a prime.
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 999357925.
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19987134 + ... + 19987183.
Almost surely, 2999357925 is an apocalyptic number.
999357925 is the 22354-th centered square number.
It is an amenable number.
999357925 is a deficient number, since it is larger than the sum of its proper divisors (239845933).
999357925 is a wasteful number, since it uses less digits than its factorization.
999357925 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 39974327 (or 39974322 counting only the distinct ones).
The product of its digits is 6889050, while the sum is 58.
The square root of 999357925 is about 31612.6228744152.
The cubic root of 999357925 is about 999.7859291770.
The spelling of 999357925 in words is "nine hundred ninety-nine million, three hundred fifty-seven thousand, nine hundred twenty-five".