10861813 has 4 divisors (see below), whose sum is σ = 10888780. Its totient is φ = 10834848.

The previous prime is 10861801. The next prime is 10861817. The reversal of 10861813 is 31816801.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31816801 = 53 ⋅600317.

It can be written as a sum of positive squares in 2 ways, for example, as 7739524 + 3122289 = 2782^2 + 1767^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10861813 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 (10861817) 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, 12870 + ... + 13687.

It is an arithmetic number, because the mean of its divisors is an integer number (2722195).

Almost surely, 2^10861813 is an apocalyptic number.

It is an amenable number.

10861813 is a deficient number, since it is larger than the sum of its proper divisors (26967).

10861813 is an equidigital number, since it uses as much as digits as its factorization.

10861813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26966.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 10861813 is about 3295.7264753010. The cubic root of 10861813 is about 221.4627935610.

The spelling of 10861813 in words is "ten million, eight hundred sixty-one thousand, eight hundred thirteen".