26919421 has 2 divisors, whose sum is σ = 26919422. Its totient is φ = 26919420.

The previous prime is 26919401. The next prime is 26919457. The reversal of 26919421 is 12491962.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24860196 + 2059225 = 4986^2 + 1435^2 .

It is a cyclic number.

It is not a de Polignac number, because 26919421 - 2⁷ = 26919293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26919401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13459710 + 13459711.

It is an arithmetic number, because the mean of its divisors is an integer number (13459711).

Almost surely, 2^26919421 is an apocalyptic number.

It is an amenable number.

26919421 is a deficient number, since it is larger than the sum of its proper divisors (1).

26919421 is an equidigital number, since it uses as much as digits as its factorization.

26919421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 34.

The square root of 26919421 is about 5188.3929111046. The cubic root of 26919421 is about 299.7012618764.

The spelling of 26919421 in words is "twenty-six million, nine hundred nineteen thousand, four hundred twenty-one".