26643629 has 2 divisors, whose sum is σ = 26643630. Its totient is φ = 26643628.

The previous prime is 26643599. The next prime is 26643647. The reversal of 26643629 is 92634662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20268004 + 6375625 = 4502^2 + 2525^2 .

It is a cyclic number.

It is not a de Polignac number, because 26643629 - 2²⁴ = 9866413 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 26643592 and 26643601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26643679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13321814 + 13321815.

It is an arithmetic number, because the mean of its divisors is an integer number (13321815).

Almost surely, 2^26643629 is an apocalyptic number.

It is an amenable number.

26643629 is a deficient number, since it is larger than the sum of its proper divisors (1).

26643629 is an equidigital number, since it uses as much as digits as its factorization.

26643629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 38.

The square root of 26643629 is about 5161.7467004881. The cubic root of 26643629 is about 298.6742573926.

It can be divided in two parts, 26643 and 629, that added together give a palindrome (27272).

The spelling of 26643629 in words is "twenty-six million, six hundred forty-three thousand, six hundred twenty-nine".