26898869 has 2 divisors, whose sum is σ = 26898870. Its totient is φ = 26898868.

The previous prime is 26898853. The next prime is 26898871. The reversal of 26898869 is 96889862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26112100 + 786769 = 5110^2 + 887^2 .

It is a cyclic number.

It is not a de Polignac number, because 26898869 - 2⁴ = 26898853 is a prime.

It is a super-2 number, since 2×26898869² = 1447098306958322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 26898871, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26898269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13449434 + 13449435.

It is an arithmetic number, because the mean of its divisors is an integer number (13449435).

Almost surely, 2^26898869 is an apocalyptic number.

It is an amenable number.

26898869 is a deficient number, since it is larger than the sum of its proper divisors (1).

26898869 is an equidigital number, since it uses as much as digits as its factorization.

26898869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2985984, while the sum is 56.

The square root of 26898869 is about 5186.4119581846. The cubic root of 26898869 is about 299.6249721164.

The spelling of 26898869 in words is "twenty-six million, eight hundred ninety-eight thousand, eight hundred sixty-nine".