26730813 has 4 divisors (see below), whose sum is σ = 35641088. Its totient is φ = 17820540.

The previous prime is 26730793. The next prime is 26730829. The reversal of 26730813 is 31803762.

26730813 is nontrivially palindromic in base 13.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 26730813 - 2¹⁶ = 26665277 is a prime.

It is a super-3 number, since 3×26730813³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26730863) 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, 4455133 + ... + 4455138.

It is an arithmetic number, because the mean of its divisors is an integer number (8910272).

Almost surely, 2^26730813 is an apocalyptic number.

It is an amenable number.

26730813 is a deficient number, since it is larger than the sum of its proper divisors (8910275).

26730813 is an equidigital number, since it uses as much as digits as its factorization.

26730813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8910274.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 26730813 is about 5170.1850063610. The cubic root of 26730813 is about 298.9996793470. Note that the first 3 decimals are identical.

The spelling of 26730813 in words is "twenty-six million, seven hundred thirty thousand, eight hundred thirteen".