985520399 has 8 divisors (see below), whose sum is σ = 1042854912. Its totient is φ = 929393080.

The previous prime is 985520383. The next prime is 985520461. The reversal of 985520399 is 993025589.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 985520399 - 2⁴ = 985520383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985520359) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 300119 + ... + 303384.

It is an arithmetic number, because the mean of its divisors is an integer number (130356864).

Almost surely, 2^985520399 is an apocalyptic number.

985520399 is a deficient number, since it is larger than the sum of its proper divisors (57334513).

985520399 is a wasteful number, since it uses less digits than its factorization.

985520399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603597.

The product of its (nonzero) digits is 874800, while the sum is 50.

The square root of 985520399 is about 31392.9992036441. Note that the first 3 decimals coincide. The cubic root of 985520399 is about 995.1499816841.

Adding to 985520399 its sum of digits (50), we get a square (985520449 = 31393²).

The spelling of 985520399 in words is "nine hundred eighty-five million, five hundred twenty thousand, three hundred ninety-nine".