26891519 has 2 divisors, whose sum is σ = 26891520. Its totient is φ = 26891518.

The previous prime is 26891443. The next prime is 26891537. The reversal of 26891519 is 91519862.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26891519 - 2¹² = 26887423 is a prime.

It is a super-2 number, since 2×26891519² = 1446307588254722, which contains 22 as substring.

It is equal to p_1676696 and since 26891519 and 1676696 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26891219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13445759 + 13445760.

It is an arithmetic number, because the mean of its divisors is an integer number (13445760).

Almost surely, 2^26891519 is an apocalyptic number.

26891519 is a deficient number, since it is larger than the sum of its proper divisors (1).

26891519 is an equidigital number, since it uses as much as digits as its factorization.

26891519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 41.

The square root of 26891519 is about 5185.7033274186. The cubic root of 26891519 is about 299.5976792197.

The spelling of 26891519 in words is "twenty-six million, eight hundred ninety-one thousand, five hundred nineteen".