26931013 has 2 divisors, whose sum is σ = 26931014. Its totient is φ = 26931012.

The previous prime is 26931007. The next prime is 26931019. The reversal of 26931013 is 31013962.

It is a balanced prime because it is at equal distance from previous prime (26931007) and next prime (26931019).

It can be written as a sum of positive squares in only one way, i.e., 20367169 + 6563844 = 4513^2 + 2562^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26931013 is a prime.

It is a super-2 number, since 2×26931013² = 1450558922412338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26931019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13465506 + 13465507.

It is an arithmetic number, because the mean of its divisors is an integer number (13465507).

Almost surely, 2^26931013 is an apocalyptic number.

It is an amenable number.

26931013 is a deficient number, since it is larger than the sum of its proper divisors (1).

26931013 is an equidigital number, since it uses as much as digits as its factorization.

26931013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 26931013 is about 5189.5098997882. The cubic root of 26931013 is about 299.7442746697.

Adding to 26931013 its reverse (31013962), we get a palindrome (57944975).

The spelling of 26931013 in words is "twenty-six million, nine hundred thirty-one thousand, thirteen".