26997623 has 2 divisors, whose sum is σ = 26997624. Its totient is φ = 26997622.

The previous prime is 26997611. The next prime is 26997629. The reversal of 26997623 is 32679962.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26997623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26997629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13498811 + 13498812.

It is an arithmetic number, because the mean of its divisors is an integer number (13498812).

Almost surely, 2^26997623 is an apocalyptic number.

26997623 is a deficient number, since it is larger than the sum of its proper divisors (1).

26997623 is an equidigital number, since it uses as much as digits as its factorization.

26997623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 44.

The square root of 26997623 is about 5195.9236907407. The cubic root of 26997623 is about 299.9911960379.

The spelling of 26997623 in words is "twenty-six million, nine hundred ninety-seven thousand, six hundred twenty-three".