891373313 has 2 divisors, whose sum is σ = 891373314. Its totient is φ = 891373312.

The previous prime is 891373247. The next prime is 891373321. The reversal of 891373313 is 313373198.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 612216049 + 279157264 = 24743^2 + 16708^2 .

It is a cyclic number.

It is not a de Polignac number, because 891373313 - 2¹⁴ = 891356929 is a prime.

It is not a weakly prime, because it can be changed into another prime (891373213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445686656 + 445686657.

It is an arithmetic number, because the mean of its divisors is an integer number (445686657).

Almost surely, 2^891373313 is an apocalyptic number.

It is an amenable number.

891373313 is a deficient number, since it is larger than the sum of its proper divisors (1).

891373313 is an equidigital number, since it uses as much as digits as its factorization.

891373313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 38.

The square root of 891373313 is about 29855.8756863703. The cubic root of 891373313 is about 962.3946701627.

The spelling of 891373313 in words is "eight hundred ninety-one million, three hundred seventy-three thousand, three hundred thirteen".