990340123441 has 4 divisors (see below), whose sum is σ = 1024489782900. Its totient is φ = 956190463984.

The previous prime is 990340123433. The next prime is 990340123459. The reversal of 990340123441 is 144321043099.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 236386550416 + 753953573025 = 486196^2 + 868305^2 .

It is a cyclic number.

It is not a de Polignac number, because 990340123441 - 2³ = 990340123433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 990340123394 and 990340123403.

It is not an unprimeable number, because it can be changed into a prime (990340123411) 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, 17074829686 + ... + 17074829743.

It is an arithmetic number, because the mean of its divisors is an integer number (256122445725).

Almost surely, 2^990340123441 is an apocalyptic number.

It is an amenable number.

990340123441 is a deficient number, since it is larger than the sum of its proper divisors (34149659459).

990340123441 is a wasteful number, since it uses less digits than its factorization.

990340123441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34149659458.

The product of its (nonzero) digits is 93312, while the sum is 40.

The spelling of 990340123441 in words is "nine hundred ninety billion, three hundred forty million, one hundred twenty-three thousand, four hundred forty-one".