990677827583 has 4 divisors (see below), whose sum is σ = 990679818240. Its totient is φ = 990675836928.

The previous prime is 990677827547. The next prime is 990677827589. The reversal of 990677827583 is 385728776099.

It is a Cunningham number, because it is equal to 995328²-1.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 990677827583 - 2¹⁰ = 990677826559 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990677827589) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 497663 + ... + 1492991.

It is an arithmetic number, because the mean of its divisors is an integer number (247669954560).

Almost surely, 2^990677827583 is an apocalyptic number.

990677827583 is a deficient number, since it is larger than the sum of its proper divisors (1990657).

990677827583 is an equidigital number, since it uses as much as digits as its factorization.

990677827583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1990656.

The product of its (nonzero) digits is 320060160, while the sum is 71.

The spelling of 990677827583 in words is "nine hundred ninety billion, six hundred seventy-seven million, eight hundred twenty-seven thousand, five hundred eighty-three".