905930813 has 2 divisors, whose sum is σ = 905930814. Its totient is φ = 905930812.

The previous prime is 905930791. The next prime is 905930863. The reversal of 905930813 is 318039509.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 905889604 + 41209 = 30098^2 + 203^2 .

It is a cyclic number.

It is not a de Polignac number, because 905930813 - 2¹² = 905926717 is a prime.

It is a super-3 number, since 3×905930813³ (a number of 28 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (905930863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 452965406 + 452965407.

It is an arithmetic number, because the mean of its divisors is an integer number (452965407).

Almost surely, 2^905930813 is an apocalyptic number.

It is an amenable number.

905930813 is a deficient number, since it is larger than the sum of its proper divisors (1).

905930813 is an equidigital number, since it uses as much as digits as its factorization.

905930813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 905930813 is about 30098.6845725856. The cubic root of 905930813 is about 967.6055345399.

The spelling of 905930813 in words is "nine hundred five million, nine hundred thirty thousand, eight hundred thirteen".