890818013 has 2 divisors, whose sum is σ = 890818014. Its totient is φ = 890818012.

The previous prime is 890818009. The next prime is 890818063. The reversal of 890818013 is 310818098.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 778521604 + 112296409 = 27902^2 + 10597^2 .

It is a cyclic number.

It is not a de Polignac number, because 890818013 - 2² = 890818009 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (890818063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445409006 + 445409007.

It is an arithmetic number, because the mean of its divisors is an integer number (445409007).

Almost surely, 2^890818013 is an apocalyptic number.

It is an amenable number.

890818013 is a deficient number, since it is larger than the sum of its proper divisors (1).

890818013 is an equidigital number, since it uses as much as digits as its factorization.

890818013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 38.

The square root of 890818013 is about 29846.5745605756. The cubic root of 890818013 is about 962.1947805591.

The spelling of 890818013 in words is "eight hundred ninety million, eight hundred eighteen thousand, thirteen".