26997643 has 2 divisors, whose sum is σ = 26997644. Its totient is φ = 26997642.

The previous prime is 26997629. The next prime is 26997667. The reversal of 26997643 is 34679962.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26997643 - 2⁵ = 26997611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26997593 and 26997602.

It is not a weakly prime, because it can be changed into another prime (26997623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13498821 + 13498822.

It is an arithmetic number, because the mean of its divisors is an integer number (13498822).

Almost surely, 2^26997643 is an apocalyptic number.

26997643 is a deficient number, since it is larger than the sum of its proper divisors (1).

26997643 is an equidigital number, since it uses as much as digits as its factorization.

26997643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 46.

The square root of 26997643 is about 5195.9256153259. The cubic root of 26997643 is about 299.9912701163.

The spelling of 26997643 in words is "twenty-six million, nine hundred ninety-seven thousand, six hundred forty-three".