26898191 has 2 divisors, whose sum is σ = 26898192. Its totient is φ = 26898190.

The previous prime is 26898187. The next prime is 26898227. The reversal of 26898191 is 19189862.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26898191 - 2² = 26898187 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26898121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13449095 + 13449096.

It is an arithmetic number, because the mean of its divisors is an integer number (13449096).

Almost surely, 2^26898191 is an apocalyptic number.

26898191 is a deficient number, since it is larger than the sum of its proper divisors (1).

26898191 is an equidigital number, since it uses as much as digits as its factorization.

26898191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 44.

The square root of 26898191 is about 5186.3465946657. The cubic root of 26898191 is about 299.6224546941.

The spelling of 26898191 in words is "twenty-six million, eight hundred ninety-eight thousand, one hundred ninety-one".