890997805 has 8 divisors (see below), whose sum is σ = 1115684352. Its totient is φ = 681806928.

The previous prime is 890997803. The next prime is 890997823. The reversal of 890997805 is 508799098.

890997805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 890997805 - 2¹ = 890997803 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 (890997803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3873789 + ... + 3874018.

It is an arithmetic number, because the mean of its divisors is an integer number (139460544).

Almost surely, 2^890997805 is an apocalyptic number.

It is an amenable number.

890997805 is a deficient number, since it is larger than the sum of its proper divisors (224686547).

890997805 is a wasteful number, since it uses less digits than its factorization.

890997805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7747835.

The product of its (nonzero) digits is 1632960, while the sum is 55.

The square root of 890997805 is about 29849.5863455425. The cubic root of 890997805 is about 962.2595088143.

The spelling of 890997805 in words is "eight hundred ninety million, nine hundred ninety-seven thousand, eight hundred five".