26870813 has 2 divisors, whose sum is σ = 26870814. Its totient is φ = 26870812.

The previous prime is 26870797. The next prime is 26870821. The reversal of 26870813 is 31807862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26853124 + 17689 = 5182^2 + 133^2 .

It is a cyclic number.

It is not a de Polignac number, because 26870813 - 2⁴ = 26870797 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26870413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13435406 + 13435407.

It is an arithmetic number, because the mean of its divisors is an integer number (13435407).

Almost surely, 2^26870813 is an apocalyptic number.

It is an amenable number.

26870813 is a deficient number, since it is larger than the sum of its proper divisors (1).

26870813 is an equidigital number, since it uses as much as digits as its factorization.

26870813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 26870813 is about 5183.7064924627. The cubic root of 26870813 is about 299.5207644817.

The spelling of 26870813 in words is "twenty-six million, eight hundred seventy thousand, eight hundred thirteen".