906963821 has 8 divisors (see below), whose sum is σ = 969126840. Its totient is φ = 845779968.

The previous prime is 906963781. The next prime is 906963847. The reversal of 906963821 is 128369609.

It can be written as a sum of positive squares in 4 ways, for example, as 585156100 + 321807721 = 24190^2 + 17939^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-906963821 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 (906963851) 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 7 ways as a sum of consecutive naturals, for example, 242876 + ... + 246581.

It is an arithmetic number, because the mean of its divisors is an integer number (121140855).

Almost surely, 2^906963821 is an apocalyptic number.

It is an amenable number.

906963821 is a deficient number, since it is larger than the sum of its proper divisors (62163019).

906963821 is a wasteful number, since it uses less digits than its factorization.

906963821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489583.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 906963821 is about 30115.8400347724. The cubic root of 906963821 is about 967.9731728359.

The spelling of 906963821 in words is "nine hundred six million, nine hundred sixty-three thousand, eight hundred twenty-one".