26631313 has 2 divisors, whose sum is σ = 26631314. Its totient is φ = 26631312.

The previous prime is 26631307. The next prime is 26631359. The reversal of 26631313 is 31313662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26543104 + 88209 = 5152^2 + 297^2 .

It is a cyclic number.

It is not a de Polignac number, because 26631313 - 2⁹ = 26630801 is a prime.

It is equal to p_1661506 and since 26631313 and 1661506 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (26631013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13315656 + 13315657.

It is an arithmetic number, because the mean of its divisors is an integer number (13315657).

Almost surely, 2^26631313 is an apocalyptic number.

It is an amenable number.

26631313 is a deficient number, since it is larger than the sum of its proper divisors (1).

26631313 is an equidigital number, since it uses as much as digits as its factorization.

26631313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 25.

The square root of 26631313 is about 5160.5535555791. The cubic root of 26631313 is about 298.6282296400.

Adding to 26631313 its reverse (31313662), we get a palindrome (57944975).

The spelling of 26631313 in words is "twenty-six million, six hundred thirty-one thousand, three hundred thirteen".