906331813 has 4 divisors (see below), whose sum is σ = 945737568. Its totient is φ = 866926060.

The previous prime is 906331801. The next prime is 906331861. The reversal of 906331813 is 318133609.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 318133609 = 139 ⋅2288731.

It is a cyclic number.

It is not a de Polignac number, because 906331813 - 2⁵ = 906331781 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 (906331313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19702843 + ... + 19702888.

It is an arithmetic number, because the mean of its divisors is an integer number (236434392).

Almost surely, 2^906331813 is an apocalyptic number.

It is an amenable number.

906331813 is a deficient number, since it is larger than the sum of its proper divisors (39405755).

906331813 is a wasteful number, since it uses less digits than its factorization.

906331813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39405754.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 906331813 is about 30105.3452562830. The cubic root of 906331813 is about 967.7482800191.

The spelling of 906331813 in words is "nine hundred six million, three hundred thirty-one thousand, eight hundred thirteen".