891701945 has 8 divisors (see below), whose sum is σ = 1090232136. Its totient is φ = 699901696.

The previous prime is 891701929. The next prime is 891701953. The reversal of 891701945 is 549107198.

891701945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 57820816 + 833881129 = 7604^2 + 28877^2 .

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 891701945 - 2⁴ = 891701929 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 891701896 and 891701905.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1682192 + ... + 1682721.

It is an arithmetic number, because the mean of its divisors is an integer number (136279017).

Almost surely, 2^891701945 is an apocalyptic number.

It is an amenable number.

891701945 is a deficient number, since it is larger than the sum of its proper divisors (198530191).

891701945 is a wasteful number, since it uses less digits than its factorization.

891701945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3364971.

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 891701945 is about 29861.3788194718. The cubic root of 891701945 is about 962.5129276950.

The spelling of 891701945 in words is "eight hundred ninety-one million, seven hundred one thousand, nine hundred forty-five".