26121619 has 2 divisors, whose sum is σ = 26121620. Its totient is φ = 26121618.

The previous prime is 26121611. The next prime is 26121631. The reversal of 26121619 is 91612162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26121619 - 2³ = 26121611 is a prime.

It is a super-2 number, since 2×26121619² = 1364677958362322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26121611) 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, 13060809 + 13060810.

It is an arithmetic number, because the mean of its divisors is an integer number (13060810).

Almost surely, 2^26121619 is an apocalyptic number.

26121619 is a deficient number, since it is larger than the sum of its proper divisors (1).

26121619 is an equidigital number, since it uses as much as digits as its factorization.

26121619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 28.

The square root of 26121619 is about 5110.9313241326. The cubic root of 26121619 is about 296.7108061805.

The spelling of 26121619 in words is "twenty-six million, one hundred twenty-one thousand, six hundred nineteen".