990766841 has 4 divisors (see below), whose sum is σ = 997894800. Its totient is φ = 983638884.

The previous prime is 990766823. The next prime is 990766849. The reversal of 990766841 is 148667099.

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: 148667099 = 7 ⋅21238157.

It is a cyclic number.

It is not a de Polignac number, because 990766841 - 2¹⁴ = 990750457 is a prime.

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 990766841.

It is not an unprimeable number, because it can be changed into a prime (990766849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3563771 + ... + 3564048.

It is an arithmetic number, because the mean of its divisors is an integer number (249473700).

Almost surely, 2^990766841 is an apocalyptic number.

It is an amenable number.

990766841 is a deficient number, since it is larger than the sum of its proper divisors (7127959).

990766841 is a wasteful number, since it uses less digits than its factorization.

990766841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7127958.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 990766841 is about 31476.4489896812. The cubic root of 990766841 is about 996.9127590851.

The spelling of 990766841 in words is "nine hundred ninety million, seven hundred sixty-six thousand, eight hundred forty-one".