999785355 has 32 divisors (see below), whose sum is σ = 1614980160. Its totient is φ = 528138240.

The previous prime is 999785341. The next prime is 999785357. The reversal of 999785355 is 553587999.

It is a happy number.

It is not a de Polignac number, because 999785355 - 2⁶ = 999785291 is a prime.

It is not an unprimeable number, because it can be changed into a prime (999785357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 812881 + ... + 814109.

It is an arithmetic number, because the mean of its divisors is an integer number (50468130).

Almost surely, 2^999785355 is an apocalyptic number.

999785355 is a deficient number, since it is larger than the sum of its proper divisors (615194805).

999785355 is a wasteful number, since it uses less digits than its factorization.

999785355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1711.

The product of its digits is 15309000, while the sum is 60.

The square root of 999785355 is about 31619.3825841050. The cubic root of 999785355 is about 999.9284465469.

The spelling of 999785355 in words is "nine hundred ninety-nine million, seven hundred eighty-five thousand, three hundred fifty-five".