905330813 has 4 divisors (see below), whose sum is σ = 905667228. Its totient is φ = 904994400.

The previous prime is 905330809. The next prime is 905330819. The reversal of 905330813 is 318033509.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 318033509 = 521 ⋅610429.

It can be written as a sum of positive squares in 2 ways, for example, as 879300409 + 26030404 = 29653^2 + 5102^2 .

It is a cyclic number.

It is not a de Polignac number, because 905330813 - 2² = 905330809 is a prime.

It is a super-3 number, since 3×905330813³ (a number of 28 digits) contains 333 as substring.

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 905330813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (905330819) 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 3 ways as a sum of consecutive naturals, for example, 164138 + ... + 169563.

It is an arithmetic number, because the mean of its divisors is an integer number (226416807).

Almost surely, 2^905330813 is an apocalyptic number.

It is an amenable number.

905330813 is a deficient number, since it is larger than the sum of its proper divisors (336415).

905330813 is a wasteful number, since it uses less digits than its factorization.

905330813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336414.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 905330813 is about 30088.7157087171. The cubic root of 905330813 is about 967.3918715946.

The spelling of 905330813 in words is "nine hundred five million, three hundred thirty thousand, eight hundred thirteen".