26850013 has 4 divisors (see below), whose sum is σ = 26894428. Its totient is φ = 26805600.

The previous prime is 26850011. The next prime is 26850029. The reversal of 26850013 is 31005862.

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: 31005862 = 2 ⋅15502931.

It can be written as a sum of positive squares in 2 ways, for example, as 4919524 + 21930489 = 2218^2 + 4683^2 .

It is a cyclic number.

It is not a de Polignac number, because 26850013 - 2¹ = 26850011 is a prime.

It is a super-3 number, since 3×26850013³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26850013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26850011) 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, 21288 + ... + 22513.

It is an arithmetic number, because the mean of its divisors is an integer number (6723607).

Almost surely, 2^26850013 is an apocalyptic number.

It is an amenable number.

26850013 is a deficient number, since it is larger than the sum of its proper divisors (44415).

26850013 is an equidigital number, since it uses as much as digits as its factorization.

26850013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44414.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 26850013 is about 5181.6998176274. The cubic root of 26850013 is about 299.4434607780.

Adding to 26850013 its reverse (31005862), we get a palindrome (57855875).

The spelling of 26850013 in words is "twenty-six million, eight hundred fifty thousand, thirteen".